Publisher: Macmillan Children s Books; Main Market Ed. Edition (July 31, 2015)
Language: English
Paperback: 352 pages
ISBN-10 : 1447281586
ISBN-13 : 978-1447281580
Age reading: 7 - 11
Item weight: 260 G

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Andy and Terry's amazing treehouse has thirteen new levels (it used to be 13 storeys, then 26, but they keep expanding!)

They've added a chocolate waterfall you can swim in, a volcano for toasting marshmallows, a bulldozer-battling level, a baby-dinosaur-petting zoo, a not-very-merry merry-go-round, a boxing elephant called the Trunkinator, an X-ray room, a disco with light-up dance floor, the world's scariest roller coaster and a top-secret thirty-ninth level which hasn't even been finished yet!

And this year Terry has created the greatest invention that he―or anyone else―has ever invented . . . a Once-upon-a-time machine that will write and illustrate their entire book for them!