Explore the weird, hilarious world of Adventure TimeTM with this beautifully illustrated 2-in-1 book based on the hit Cartoon Network series. All-new, gorgeous, hilarious, and grotesque illustrations? Ancient wizard lore, spells, curses, and jokes? Memories and mementos from a cute demon girl's childhood? Goofball commentary by Finn, Jake, Marceline, and the Ice King? Check, check, check, check please! A treasure for any fan of the series, this magical and mysterious tome takes a deep dive into the world of Cartoon Network's Adventure TimeTM. Aspiring heroes and wizards will find invaluable information in The Enchiridion—the ancient book of Ooo—and true fans will learn everything they ever wanted to know about Marceline the Vampire Queen in her Super Secret Scrapbook. From the creative team behind the New York Times–bestselling Adventure Time Encyclopaedia, this in-world compendium of all things Oooian is a humor-, paradox-, and literary contrivance–filled book true to the imagination, innovation, and heart of Adventure TimeTM.