
Ahriman
science fiction
Series · science fiction
The Long Earth series by Terry Pratchett has 5 known books (5 published) and is best read in publication order, starting with The Long Earth (2012). The latest book with a fully recorded publication date is The Long Cosmos.
Start here: The Long Earth (2012) — 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.
The Long Earth (2012) follows Joshua Valiente, a natural stepper who never needs the Stepper device, as an AI calling itself Lobsang recruits him to explore an infinite chain of parallel, uninhabited Earths -- Terry Pratchett's first major collaboration outside Discworld, co-written with hard-SF novelist Stephen Baxter.
Alternative text for cover: Cover of The Long EarthThe Long War followed The Long Earth a year later, continuing the series as its second entry and expanding the premise into wars over stepping rights as humanity floods into the Long Earth's endless frontier.
Alternative text for cover: Cover of The Long WarThe Long Mars is the third book in The Long Earth, published in June 2014 at 424 pages, following the political and ecological consequences of infinite frontier further as Pratchett and Baxter's saga continues.
Alternative text for cover: Cover of The Long MarsThe Long Earth continues with The Long Utopia, the fourth entry, released in June 2015, tracking generational change as children grow up never having known a non-Long Earth.
Alternative text for cover: Cover of The Long UtopiaAt 400 pages, The Long Cosmos is the shortest book in The Long Earth to date, published in 2016 as the fifth and final entry -- completed by Baxter after Pratchett's death from Alzheimer's the previous year.
Alternative text for cover: Cover of The Long CosmosWhen a simple homemade device called a Stepper lets ordinary people 'step' sideways into a parallel, uninhabited version of Earth -- and then another, and another, in a chain of infinite Earths stretching in both directions -- human civilization is transformed overnight. The Long Earth (2012) follows Joshua Valiente, a natural stepper who never needs the device at all, as he's recruited by an artificial intelligence calling itself Lobsang to explore the Long Earth's outer reaches, encountering the strange non-human intelligences already living there and the mass migration of humanity fleeing an overcrowded 'Datum' Earth for endless new frontiers. It's Terry Pratchett's first major sustained collaboration outside Discworld, pairing his character-driven wit with hard-SF novelist Stephen Baxter's love of big, rigorous speculative concepts.
The four sequels -- The Long War, The Long Mars, The Long Utopia, and The Long Cosmos -- expand the premise across decades, following the political, ecological, and existential consequences of infinite frontier: wars over stepping rights, the discovery of other stepping species, generational change as children grow up never having known a non-Long Earth, and a first-contact story that spans far more than one Earth. Pratchett, in the late stages of the Alzheimer's disease that eventually took his life in 2015, worked on the series until shortly before his death, with the final volume published posthumously.
Five: The Long Earth (2012), The Long War (2013), The Long Mars (2014), The Long Utopia (2015), and The Long Cosmos (2016).
Publication order: The Long Earth, The Long War, The Long Mars, The Long Utopia, The Long Cosmos. It's a continuous story across all five.
No -- all five books are co-written with hard-SF author Stephen Baxter, Pratchett's first sustained collaborator outside his Discworld work with Neil Gaiman.
No -- it's an entirely separate contemporary/near-future science fiction setting with no shared characters or continuity.
The Long Cosmos (2016) was published just over a year after Pratchett died in March 2015; he worked on the series with Baxter until shortly before his death.
Reading order last verified .