A sequel to The 13-Story Treehouse finds Andy and Terry recounting the story of how they first met, an adventure marked by emergency shark operations, giant storms and wooden pirate heads.

For all the books they have written, Andy is the narrator and Terry is the illustrator, but when Terry tries to narrate too, the story goes out of control and they must evade the Story Police, who want to arrest them for crimes against storytelling.

Andy and Terry 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.

Andy and Terry live in a 130-story treehouse. It used to be a 117-story treehouse, but they added another 13 stories. It has a soap bubble blaster, a time-wasting level, a 13-story igloo, the GRABINATOR (it can grab anything from anywhere at any time). It is a toilet paper factory, and an extraterrestrial observation center for observing aliens. As it turns out, though, it's Andy, Terry, and Jill who are being observed and then abducted by a giant...

"Andy and Terry are once again inviting readers to come hang out with them in their astonishing 39-story treehouse (it used to be 13 stories, then 26 stories, but they keep expanding). And this year they will have even more time to jump on the world's highest trampoline, toast marshmallows in an active volcano, swim in the chocolate waterfall, pet baby dinosaurs, and go head-to-trunk with the Trunkinator, since Terry has created the greatest invention...

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.

A volume of graphic stories features such outrageous elements as zombie kittens, rocket-stealing ants, and bloodsucking grannies.

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 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!...

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!