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The Magic Tree House series by Mary Pope Osborne has 67 known books (67 published) and is best read in publication order, starting with Dinosaurs Before Dark (1992). The latest book with a fully recorded publication date is Magic Tree House: Sea Otter Sunrise.
Start here: Dinosaurs Before Dark (1992) — then read straight through in publication order.
The date order of published books and any announced future entries — the default way to read the series.
"Dinosaurs Before Dark" is Magic Tree House book 1, published in 1992, and runs 80 pages. Like every Magic Tree House adventure, it sends siblings Jack and Annie through the tree house in the woods behind their Frog Creek, Pennsylvania home to a different moment in history, where they solve a problem and make it back before anyone notices they were gone.
Alternative text for cover: Cover of Dinosaurs Before DarkPublished in 1993, "The Knight at Dawn" holds position 2 in the Magic Tree House sequence, and spans 71 pages. It follows Mary Pope Osborne's format for the series: short chapters and brisk pacing built to bridge early readers into true chapter books, with real history, science, or geography folded into Jack and Annie's latest trip through time.
Alternative text for cover: Cover of The Knight at Dawn"Mummies in the Morning" (1993) is the 3rd book in the series, and runs 65 pages. As with the rest of the series, the tree house's magic -- and the mysterious librarian Morgan le Fay who oversees it -- sends Jack and Annie somewhere new to learn something real while solving a problem specific to where they've landed.
Alternative text for cover: Cover of Mummies in the Morning"Pirates Past Noon" is Magic Tree House book 4, published in 1994, and is 176 pages long. It carries forward the series' reliable structure: a short, forward-moving adventure for newly independent readers, with genuine historical or scientific detail woven into Jack and Annie's latest journey.
Alternative text for cover: Cover of Pirates Past NoonPublished in 1995, "Night of the Ninjas" holds position 5 in the Magic Tree House sequence, and comes in at 80 pages. Like every Magic Tree House adventure, it sends siblings Jack and Annie through the tree house in the woods behind their Frog Creek, Pennsylvania home to a different moment in history, where they solve a problem and make it back before anyone notices they were gone.
Alternative text for cover: Cover of Night of the Ninjas"Afternoon on the Amazon" (1995) is the 6th book in the series, and is 70 pages long. It follows Mary Pope Osborne's format for the series: short chapters and brisk pacing built to bridge early readers into true chapter books, with real history, science, or geography folded into Jack and Annie's latest trip through time.
Alternative text for cover: Cover of Afternoon on the Amazon"Sunset of the Sabertooth" is Magic Tree House book 7, published in 1996, and spans 74 pages. As with the rest of the series, the tree house's magic -- and the mysterious librarian Morgan le Fay who oversees it -- sends Jack and Annie somewhere new to learn something real while solving a problem specific to where they've landed.
Alternative text for cover: Cover of Sunset of the SabertoothPublished in 1996, "Midnight on the Moon" holds position 8 in the Magic Tree House sequence, and runs 76 pages. It carries forward the series' reliable structure: a short, forward-moving adventure for newly independent readers, with genuine historical or scientific detail woven into Jack and Annie's latest journey.
Alternative text for cover: Cover of Midnight on the Moon"Dolphins at Daybreak" (1997) is the 9th book in the series, and spans 73 pages. Like every Magic Tree House adventure, it sends siblings Jack and Annie through the tree house in the woods behind their Frog Creek, Pennsylvania home to a different moment in history, where they solve a problem and make it back before anyone notices they were gone.
Alternative text for cover: Cover of Dolphins at Daybreak"Ghost Town at Sundown" is Magic Tree House book 10, published in 1997, and comes in at 78 pages. It follows Mary Pope Osborne's format for the series: short chapters and brisk pacing built to bridge early readers into true chapter books, with real history, science, or geography folded into Jack and Annie's latest trip through time.
Alternative text for cover: Cover of Ghost Town at SundownPublished in 1998, "Lions at Lunchtime" holds position 11 in the Magic Tree House sequence, and is 73 pages long. As with the rest of the series, the tree house's magic -- and the mysterious librarian Morgan le Fay who oversees it -- sends Jack and Annie somewhere new to learn something real while solving a problem specific to where they've landed.
Alternative text for cover: Cover of Lions at Lunchtime"Polar Bears Past Bedtime" (1998) is the 12th book in the series, and comes in at 80 pages. It carries forward the series' reliable structure: a short, forward-moving adventure for newly independent readers, with genuine historical or scientific detail woven into Jack and Annie's latest journey.
Alternative text for cover: Cover of Polar Bears Past Bedtime"Vacation Under the Volcano" is Magic Tree House book 13, published in 1998, and runs 74 pages. Like every Magic Tree House adventure, it sends siblings Jack and Annie through the tree house in the woods behind their Frog Creek, Pennsylvania home to a different moment in history, where they solve a problem and make it back before anyone notices they were gone.
Alternative text for cover: Cover of Vacation Under the VolcanoPublished in 1998, "Day of the Dragon King" holds position 14 in the Magic Tree House sequence, and spans 80 pages. It follows Mary Pope Osborne's format for the series: short chapters and brisk pacing built to bridge early readers into true chapter books, with real history, science, or geography folded into Jack and Annie's latest trip through time.
Alternative text for cover: Cover of Day of the Dragon King"Viking Ships at Sunrise" (1998) is the 15th book in the series, and runs 80 pages. As with the rest of the series, the tree house's magic -- and the mysterious librarian Morgan le Fay who oversees it -- sends Jack and Annie somewhere new to learn something real while solving a problem specific to where they've landed.
Alternative text for cover: Cover of Viking Ships at Sunrise"Hour of the Olympics" is Magic Tree House book 16, published in 1998, and is 80 pages long. It carries forward the series' reliable structure: a short, forward-moving adventure for newly independent readers, with genuine historical or scientific detail woven into Jack and Annie's latest journey.
Alternative text for cover: Cover of Hour of the OlympicsPublished in 1999, "Tonight on the Titanic" holds position 17 in the Magic Tree House sequence, and comes in at 96 pages. Like every Magic Tree House adventure, it sends siblings Jack and Annie through the tree house in the woods behind their Frog Creek, Pennsylvania home to a different moment in history, where they solve a problem and make it back before anyone notices they were gone.
Alternative text for cover: Cover of Tonight on the Titanic"Buffalo Before Breakfast" (1999) is the 18th book in the series, and is 96 pages long. It follows Mary Pope Osborne's format for the series: short chapters and brisk pacing built to bridge early readers into true chapter books, with real history, science, or geography folded into Jack and Annie's latest trip through time.
Alternative text for cover: Cover of Buffalo Before Breakfast"Tigers at Twilight" is Magic Tree House book 19, published in 1999, and spans 76 pages. As with the rest of the series, the tree house's magic -- and the mysterious librarian Morgan le Fay who oversees it -- sends Jack and Annie somewhere new to learn something real while solving a problem specific to where they've landed.
Alternative text for cover: Cover of Tigers at TwilightPublished in 2000, "Dingoes at Dinnertime" holds position 20 in the Magic Tree House sequence, and runs 80 pages. It carries forward the series' reliable structure: a short, forward-moving adventure for newly independent readers, with genuine historical or scientific detail woven into Jack and Annie's latest journey.
Alternative text for cover: Cover of Dingoes at Dinnertime"Civil War on Sunday" (2000) is the 21st book in the series, and spans 75 pages. Like every Magic Tree House adventure, it sends siblings Jack and Annie through the tree house in the woods behind their Frog Creek, Pennsylvania home to a different moment in history, where they solve a problem and make it back before anyone notices they were gone.
Alternative text for cover: Cover of Civil War on Sunday"Revolutionary War on Wednesday" is Magic Tree House book 22, published in 2000, and comes in at 69 pages. It follows Mary Pope Osborne's format for the series: short chapters and brisk pacing built to bridge early readers into true chapter books, with real history, science, or geography folded into Jack and Annie's latest trip through time.
Alternative text for cover: Cover of Revolutionary War on WednesdayPublished in 2001, "Twister on Tuesday" holds position 23 in the Magic Tree House sequence, and is 70 pages long. As with the rest of the series, the tree house's magic -- and the mysterious librarian Morgan le Fay who oversees it -- sends Jack and Annie somewhere new to learn something real while solving a problem specific to where they've landed.
Alternative text for cover: Cover of Twister on Tuesday"Earthquake in the Early Morning" (2001) is the 24th book in the series, and comes in at 72 pages. It carries forward the series' reliable structure: a short, forward-moving adventure for newly independent readers, with genuine historical or scientific detail woven into Jack and Annie's latest journey.
Alternative text for cover: Cover of Earthquake in the Early Morning"Stage Fright on a Summer Night" is Magic Tree House book 25, published in 2002, and runs 71 pages. Like every Magic Tree House adventure, it sends siblings Jack and Annie through the tree house in the woods behind their Frog Creek, Pennsylvania home to a different moment in history, where they solve a problem and make it back before anyone notices they were gone.
Alternative text for cover: Cover of Stage Fright on a Summer NightPublished in 2002, "Good Morning, Gorillas" holds position 26 in the Magic Tree House sequence, and spans 71 pages. It follows Mary Pope Osborne's format for the series: short chapters and brisk pacing built to bridge early readers into true chapter books, with real history, science, or geography folded into Jack and Annie's latest trip through time.
Alternative text for cover: Cover of Good Morning, Gorillas"Thanksgiving on Thursday" (2002) is the 27th book in the series, and runs 73 pages. As with the rest of the series, the tree house's magic -- and the mysterious librarian Morgan le Fay who oversees it -- sends Jack and Annie somewhere new to learn something real while solving a problem specific to where they've landed.
Alternative text for cover: Cover of Thanksgiving on Thursday"High Tide in Hawaii" is Magic Tree House book 28, published in 2003, and is 73 pages long. It carries forward the series' reliable structure: a short, forward-moving adventure for newly independent readers, with genuine historical or scientific detail woven into Jack and Annie's latest journey.
Alternative text for cover: Cover of High Tide in HawaiiPublished in 2001, "Magic Tree House: Christmas in Camelot" holds position 29 in the Magic Tree House sequence, and comes in at 144 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Christmas in Camelot"Magic Tree House: Haunted Castle on Hallows Eve" (2003) is the 30th book in the series, and is 123 pages long. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: Haunted Castle on Hallows Eve"Magic Tree House: Summer of the Sea Serpent" is Magic Tree House book 31, published in 2004, and spans 129 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Summer of the Sea SerpentPublished in 2004, "Magic Tree House: Winter of the Ice Wizard" holds position 32 in the Magic Tree House sequence, and runs 131 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Winter of the Ice Wizard"Magic Tree House: Carnival at Candlelight" (2005) is the 33rd book in the series, and spans 126 pages. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: Carnival at Candlelight"Magic Tree House: Season of the Sandstorms" is Magic Tree House book 34, published in 2005, and comes in at 125 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Season of the SandstormsPublished in 2006, "Magic Tree House: Night of the New Magicians" holds position 35 in the Magic Tree House sequence, and is 111 pages long. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Night of the New Magicians"Magic Tree House: Blizzard of the Blue Moon" (2006) is the 36th book in the series, and comes in at 128 pages. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: Blizzard of the Blue Moon"Magic Tree House: Dragon of the Red Dawn" is Magic Tree House book 37, published in 2007, and runs 108 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Dragon of the Red DawnPublished in 2007, "Magic Tree House: Monday with a Mad Genius" holds position 38 in the Magic Tree House sequence, and spans 121 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Monday with a Mad Genius"Magic Tree House: Dark Day in the Deep Sea" (2008) is the 39th book in the series, and runs 129 pages. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: Dark Day in the Deep Sea"Magic Tree House: Eve of the Emperor Penguin" is Magic Tree House book 40, published in 2008, and is 128 pages long. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Eve of the Emperor PenguinPublished in 2009, "Magic Tree House: Moonlight on the Magic Flute" holds position 41 in the Magic Tree House sequence, and comes in at 5 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Moonlight on the Magic Flute"Magic Tree House: A Good Night for Ghosts" (2009) is the 42nd book in the series, and is 113 pages long. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: A Good Night for Ghosts"Magic Tree House: Leprechaun in Late Winter" is Magic Tree House book 43, published in 2010, and spans 128 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Leprechaun in Late WinterPublished in 2010, "Magic Tree House: A Ghost Tale for Christmas Time" holds position 44 in the Magic Tree House sequence, and runs 135 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: A Ghost Tale for Christmas Time"Magic Tree House: A Crazy Day with Cobras" (2011) is the 45th book in the series, and spans 128 pages. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: A Crazy Day with Cobras"Magic Tree House: Dogs in the Dead of Night" is Magic Tree House book 46, published in 2011, and comes in at 114 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Dogs in the Dead of NightPublished in 2011, "Magic Tree House: Abe Lincoln at Last!" holds position 47 in the Magic Tree House sequence, and is 121 pages long. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Abe Lincoln at Last!"Magic Tree House: A Perfect Time for Pandas" (2012) is the 48th book in the series, and comes in at 128 pages. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: A Perfect Time for Pandas"Magic Tree House: Stallion by Starlight" is Magic Tree House book 49, published in 2013, and runs 132 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Stallion by StarlightPublished in 2013, "Magic Tree House: Hurry Up, Houdini!" holds position 50 in the Magic Tree House sequence, and spans 128 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Hurry Up, Houdini!"Magic Tree House: High Time for Heroes" (2014) is the 51st book in the series, and runs 118 pages. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: High Time for Heroes"Magic Tree House: Soccer on Sunday" is Magic Tree House book 52, published in 2014, and is 128 pages long. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Soccer on SundayPublished in 2015, "Magic Tree House: Shadow of the Shark" holds position 53 in the Magic Tree House sequence, and comes in at 130 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Shadow of the Shark"Magic Tree House: Balto of the Blue Dawn" (2016) is the 54th book in the series, and is 5 pages long. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: Balto of the Blue Dawn"Magic Tree House: Night of the Ninth Dragon" is Magic Tree House book 55, published in 2016, and spans 144 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Night of the Ninth DragonPublished in 2017, "Magic Tree House: A Big Day for Baseball" holds position 56 in the Magic Tree House sequence, and runs 96 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: A Big Day for Baseball"Magic Tree House: Hurricane Heroes in Texas" (2018) is the 57th book in the series, and spans 88 pages. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: Hurricane Heroes in Texas"Magic Tree House: Warriors in Winter" is Magic Tree House book 58, published in 2019, and comes in at 112 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Warriors in WinterPublished in 2019, "Magic Tree House: To the Future, Ben Franklin!" holds position 59 in the Magic Tree House sequence, and is 112 pages long. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: To the Future, Ben Franklin!"Magic Tree House: Narwhal on a Sunny Night" (2020) is the 60th book in the series, and comes in at 112 pages. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: Narwhal on a Sunny Night"Magic Tree House: Late Lunch with Llamas" is Magic Tree House book 61, published in 2020, and runs 112 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Late Lunch with LlamasPublished in 2021, "Magic Tree House: Camp Time in California" holds position 62 in the Magic Tree House sequence, and spans 114 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Camp Time in California"Magic Tree House: Sunlight on the Snow Leopard" (2022) is the 63rd book in the series, and runs 112 pages. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: Sunlight on the Snow Leopard"Magic Tree House: Rhinos at Recess" is Magic Tree House book 64, published in 2023, and is 96 pages long. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Rhinos at RecessPublished in 2023, "Magic Tree House: Time of the Turtle King" holds position 65 in the Magic Tree House sequence, and comes in at 112 pages. It belongs to the Merlin Missions stretch of the series, the more advanced tier Morgan le Fay opens up to Jack and Annie once the original run of adventures has shown they're ready.
Alternative text for cover: Cover of Magic Tree House: Time of the Turtle King"Magic Tree House: Windy Night with Wild Horses" (2024) is the 66th book in the series, and is 96 pages long. As one of the Merlin Missions, it gives Jack and Annie a longer, higher-stakes trip than the earlier books, still built around Mary Pope Osborne's mix of brisk chapter-book pacing and real historical or scientific detail.
Alternative text for cover: Cover of Magic Tree House: Windy Night with Wild Horses"Magic Tree House: Sea Otter Sunrise" is Magic Tree House book 67, published in 2025, and spans 112 pages. By this point in the series Jack and Annie have graduated to the longer, slightly more advanced Merlin Missions, sent out under Morgan le Fay's direction now that they've proven themselves on the earlier, gentler adventures.
Alternative text for cover: Cover of Magic Tree House: Sea Otter SunriseJack and Annie are ordinary siblings from Frog Creek, Pennsylvania who discover a mysterious tree house in the woods behind their house -- one packed with books that, when pointed at and wished upon, transport them anywhere and anywhen. Dinosaur-age forests, the deck of the Titanic, ancient Egypt, the Wild West, the surface of the moon: every book sends the pair on a short, brisk adventure where they solve a specific problem, learn something real about the time and place they've landed in, and make it home before anyone notices they're gone.
Mary Pope Osborne built the series to work as a genuine bridge between early readers and true chapter books: short chapters, simple sentences, constant forward momentum, and a reliable structure that removes any guesswork about what's coming. Each adventure quietly teaches real history, science, or geography without ever feeling like a lesson, which is exactly why the series has become a staple of elementary classrooms and home libraries alike. A magical librarian named Morgan le Fay oversees the tree house's true purpose (collecting stories from across time) and eventually recruits Jack and Annie for higher-stakes "Merlin Missions" once they've proven themselves on the earlier, gentler adventures.
With well over 30 million copies sold and dozens of tie-in nonfiction "Fact Tracker" companions, Magic Tree House remains one of the most trusted go-to series for getting newly independent readers hooked on chapter books.
This page tracks 67 books: the original 28-book series, the 27-book Merlin Missions, and 12 further books continuing the same story since 2017, through Sea Otter Sunrise (2025).
Read the original series first (Dinosaurs Before Dark onward), then the Merlin Missions, then the later continuation books, each tier in its own numbered order.
A slightly more advanced continuation of the same Jack-and-Annie story, aimed at readers who've outgrown the original series' reading level but aren't ready to leave the tree house behind.
No, it's ongoing. Mary Pope Osborne has continued publishing new adventures roughly once a year.
No, the Fact Trackers are optional nonfiction companions that expand on the real history or science behind a specific fiction adventure; they're not required to follow the story.
Reading order last verified .