Surprisingly good! Jeremy is a teenager whose best friend (and the book's narrator) is the ghost of Jacob Grimm. Young adult fantasy, fairy tale feel, magical, mysterious. 
 One of the best YA books I've read recently. This made me want to go find a book of Grimm stories. Loved how the author wove the fairy tales throughout the novel. I wish the author had addressed my one unanswered question (view spoiler)[ who tried to give Jeremy the right answer when he was on the game show? (hide spoiler)] and there were a few moments that just weren't terribly believable (view spoiler)[ why did no one look twice at Jenny when she accessed the baker's dungeon without any trouble; also, suicide by burning yourself to death? I don't know about that. (hide spoiler)]. Outside of these minor issues, though, this was a very good book.