The 91-Storey Treehouse is the seventh book of Andy Griffiths 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. Join Andy and Terry in their 91-storey spectacular treehouse (it used to be a 78-story treehouse, but they keep getting ideas for new stories!) 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. which they're not sure whether to push or not because they can't remember what it does. Well, what are you waiting for? Come on up!.