When Andy develops a severe toothache that prevents him from writing new jokes for their book, Terry uses their fantastical treehouse's money-making machine funds to purchase a Joke Writer 2000, with unexpected results.

Andy and Terry must get past their differences to save their story ideas from a herd of spy cows.

"Andy and Terry live in a 169-story treehouse...It now has a kangaroo-riding range, a Whatever-Weather-You-Want dome, and a hall of fun-house mirrors--the perfect place to hide from the truancy officer who is trying to catch them and Jill and make them go to school! Unfortunately, the hall of fun-house mirrors is also the place where their evil troublemaking twins, Anti-Andy, Terrible-Terry, and Junkyard-Jill, live in a doppelganger mirror, and they...

"It's the night before Christmas but Andy and Terry aren't ready yet! They haven't written their letters to Santa, they haven't sung any carols or hung their stockings, and now Mr. Big Nose wants their next book done by tomorrow. When Santa Claus's sleigh crash-lands in the treehouse, the reindeer become tangled in the branches and Santa falls into the cloning machine. With dozens of Santas running around and no way to tell which one's the real one,...

A collection of 13 short stories from the world of the New York Times-bestselling Treehouse chapter book series."-- A lot of stuff happens in our ever-expanding treehouse. Not everything gets into the books. These are some other things that happened to us ... Surreal, funny and supremely silly--all with the spirit of the Treehouse--come on up to hear some Tales from the 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???

When Andy has a toothache that hurts so bad he can't write jokes for their new book, Terry knows just what to do: buy a Joke Writer 2000 to write the jokes for them! What could go wrong?

Join Andy and Terry in their now 91-storey spectacular treehouse. They've added 13 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...

"Join Andy and Terry in their spectacular new 78-storey treehouse. They've added 13 new levels including a drive-through 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!"--Container.