The 52 Story Treehouse Vegetable Villains by Griffith
Andy and Terry live in a 52-story treehouse. (It used to be a 39-story treehouse, but they keep expanding.) It has a chainsaw-juggling level, a make-your-own-pizza parlor, a rocket-powered carrot-launcher, a life-size snakes and ladders game, a remembering booth, a Ninja Snail Training Academy, and a high-tech detective agency, with all the latest high-tech detective technology, including the Disguise-o-Matic 5000!
The Disguise-o-Matic 5000 is sure to come in handy as they try to solve the mystery of "What happened to Mr. Big Nose?" After all, it's hard to turn in your next book when your publisher has vanished!