What time is it? Adventure Time! Meet Finn the Human, Jake the Dog and the magical inhabitants of the Land of Ooo in this righteous official sticker book. With awesome activities and 1000 totally algebraic stickers to add to the pages and your stuff, dude! Featuring fan-favourite characters Princess Bubblegum, Lumpy Space Princess, Marceline the Vampire Queen, the Ice King and more. Mathematical! Collect more radical Adventure Time books from Penguin, including Finn and Jake's Awesome Activity Book and the Adventure Time Official Guide to the Land of Ooo!