The 39-Storey Treehouse : Macmillan Children's Books : 9781447281580 : 1447281586 : 30 Jul 2015 : The 39-Storey Treehouse is the third book in Andy Griffith's and Terry Denton's wacky treehouse adventures, where the laugh-out-loud story is told through a combination of text and fantastic cartoon-style illustrations. 'The kind of book I would have loved as a kid' - Tom Fletcher, author of The Danger Gang 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 i