"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...

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 117-story treehouse. (It used to be a 104-story treehouse, but it just keeps growing!) It now has a pajama-party room, a water-ski park filled with flesh-eating piranhas, an Underpants Museum, a giant-fighting-robot arena, and the Door of Doom (don't open it or you'll be COMPLETELY and UTTERLY DOOMED!). For as long as Andy and Terry have been writing books together, Andy has always been the narrator and Terry has always been...

An overly-alarmed Chester the cat predicts a gruesome fate for the pets in the Monroe household when a writer of juvenile horror fiction and his bird companion stay overnight.

Nanette O'Hare, a star student and athlete, is given a mysterious out-of-print cult classic novel by her beloved teacher that sparks the rebel within her, but as she befriends the reclusive author and attempts to insert her true self into the world with wild abandon, Nanette learns the hard way that sometimes rebellion comes at a high price.

When Tuesday McGillycuddy and her beloved dog Baxterr discover that Tuesday's mother--the famous author Serendipity Smith--has gone missing, they set out on a magical adventure. In their quest to find Serendipity, they discover the mysterious and unpredictable place that stories come from. To save the lives of those she loves, Tuesday must summon all her wit, courage, and imagination. But how will she ever find her way home?

When friends Eddie, Harris, and Maggie discover that the scary adventures in their favorite author's fictional books come true, they must find a way to close the portal that allows evil creatures and witches to enter their hometown of Gatesweed.

"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,...

Before he can begin the story he wants to write, an author hears an insistent call for more bears and soon the pages are crawling with them.

"Fourth graders George Beard and Harold Hutchins are a couple of class clowns. The only thing they enjoy more than playing practical jokes is creating their own comic books. And together they've created the greatest superhero in the history of their elementary school: Captain Underpants! His true identity is SO secret, even HE doesn't know who he is!"--Provided by publisher.