Titles in this set:

The 13-Storey Treehouse

The 26-Storey Treehouse

The 39-Storey Treehouse

The 52-Storey Treehouse

The 65-Storey Treehouse

The 78-Storey Treehouse

The 91-Storey Treehouse

The 104-Storey Treehouse

The 117-Storey Treehouse

The 13-Storey Treehouse
Andy and Terry live in the WORLD'S BEST treehouse! It's got a giant catapult, a secret underground laboratory, a tank of man-eating sharks and a marshmallow machine that follows you around and shoots marshmallows into your mouth whenever you're hungry! Just watch out for the sea monkeys, and the monkeys pretending to be sea monkeys, and the giant mutant mermaid sea monster . . . Oh, and, whatever you do, don't get trapped in a burp-gas-filled bubble . . . !

The 26-Storey Treehouse
Andy and Terry have expanded their treehouse! There are now thirteen brand-new storeys, including a dodgem-car rink, a skate ramp, a mud-fighting arena, an antigravity chamber, an ice-cream parlour with seventy-eight flavours run by an ice-cream-serving robot called Edward Scooperhands, and the Maze of Doom - a maze so complicated that nobody who has gone in has ever come out again . . . well, not yet anyway . .

The 39-Storey Treehouse
Andy and Terry's amazing treehouse has thirteen new levels! 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! But what good is all this stuff when Andy and Terry are trying to write their fastest book ever? You'll have to read it to find out!

The 52-Storey Treehouse
Andy and Terry have expanded their treehouse! There are now thirteen brand-new storeys, including a dodgem-car rink, a skate ramp, a mud-fighting arena, an antigravity chamber, an ice-cream parlour with seventy-eight flavours run by an ice-cream-serving robot called Edward Scooperhands, and the Maze of Doom - a maze so complicated that nobody who has gone in has ever come out again . . . well, not yet anyway

The 65-Storey Treehouse
Andy and Terry's incredible, ever-expanding treehouse has thirteen new storeys, including a watermelon-smashing level, a wave machine, a life-size snakes and ladders game (with real ladders and real snakes!), a rocket-powered carrot launcher, a Ninja Snail Training Academy and a high-tech detective agency with all the latest high-tech detective technology. Which is lucky, because they have a BIG mystery to solve - Where is Mr Big Nose??

The 78-Storey Treehouse

Join Andy and Terry in their spectacular new 78-storey treehouse. They've added 13 new levels including a drive-thru car wash, a combining machine, a scribbletorium, an ALL-BALL sports stadium, Andyland, Terrytown, a high-security potato chip storage facility and an open-air movie theatre. Well, what are you waiting for? Come on up!

The 91-Storey Treehouse

Join Andy and Terry in their now 91-storey spectacular treehouse. They've added thirteen new levels, including the world's most powerful whirlpool, a mashed-potato-and-gravy train and a human pinball machine. Why not try your luck on the spin-and-win prize wheel or hang out in a giant spider web (with a giant spider), or you can always get your fortune told by Madam Know-it-all or eat a submarine sandwich the size of an actual submarine while deciding whether or not to push the big red button . . .

Well, what are you waiting for? Come on up!

The 104-Storey Treehouse

Join Andy and Terry in their now 104-storey spectacular treehouse. They've added thirteen new levels, including a never-ending staircase, a burp bank, and even a mighty fortress. But Andy and Terry are in a race against time to find a funny story for their next book – will the tooth fairy, the two-million-dollar shop or even the riddles of the deep-thoughts thinking room be able to help?

Well, what are you waiting for? Come on up!

The 117-Storey Treehouse

Andy and Terry have added another thirteen levels of crazy fun to their every-growing treehouse. They've got a tiny-horse level, a pyjama-party room, an Underpants Museum and Treehouse Information Centre! But Andy and Terry have found themselves running from the Story Police and the only way to escape, is through the terrifying Door of Doom!