In the deepest, darkest corner of the solar system lies an enemy more terrifying than the people of Earth could imagine. Vicious warriors who will let nothing stand in the way of their crusade for galactic domination. They're cunning. They're ruthless. They're zombie butts from Uranus! Earth has only one hope for salvation. Zack, a twelve-year-old who wants nothing more than to wash his hands of the whole butt-fighting business. But Zack cannot shirk...

"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...

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...

A collection of 13 short stories from the world of the New York Times-bestselling Treehouse chapter book series."--

"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,...