Who Let the Ghosts Out?
- Published
- 1 January 2004
- Pages
- 129
- ISBN-13
- 9785556254800
- Type
- novel
About this book
Who Let the Ghosts Out? (2004) opens Mostly Ghostly by introducing Max Doyle and the two friendly ghost children haunting his house, Nicky and Tara, who are stuck reliving the same day from decades earlier and can't remember how they died. At 129 pages, it sets up the continuing mystery and relationship that carries through all eight R.L. Stine books, giving the series more emotional throughline than his typical monster-of-the-week format.
Key facts about Who Let the Ghosts Out?
Who Let the Ghosts Out? is a novel by R. L. Stine. Readers have had it since 2004. It runs to 129 pages.
Our list holds 1 edition of Who Let the Ghosts Out?. Since each edition has its own ISBN, search for 9785556254800 to find the main one.
Who Let the Ghosts Out? is book 1 of 8 in the Mostly Ghostly series. The series has 8 published books. As a result, this is the book to start the series with.
Additionally, R. L. Stine writes Fear Street, Goosebumps and Goosebumps Series 2000, plus 8 more series. Those series sit on our horror and middle-grade comedy shelves. Meanwhile, What We Do at Night is the latest published R. L. Stine book on file, from 4 August 2026.
About R. L. Stine
R. L. Stine is an American author widely credited with turning horror fiction into a mainstream habit for young readers. See every R. L. Stine book in order.
Its place in Mostly Ghostly
Who Let the Ghosts Out? is book 1 in the Mostly Ghostly series. It is followed by Have You Met My Ghoulfriend?. See the full Mostly Ghostly reading order.
Mostly Ghostly follows Max Doyle, an ordinary kid who discovers his house is haunted by Nicky and Tara, two friendly ghost children stuck reliving the same day from decades earlier, unable to remember how they died or move on. Unlike most of R.L. Stine's monster-of-the-week series, Mostly Ghostly builds a continuing relationship between its human and ghost leads across all eight books -- Max becomes genuinely invested in helping Nicky and Tara solve the mystery of their deaths, giving the series more emotional…
Editions
- edition · unknown publisher · — · ISBN 9785556254800