Thirteen-year-old Juan's summer is off to a terrible start. First, his parents separate. Then, almost as bad, Juan is sent away to his strange Uncle Tito's house for the entire holiday! Who wants to live with an oddball recluse who has zigzag eyebrows, drinks fifteen cups of smoky tea a day, and lives inside a huge, mysterious library? As Juan adjusts to his new life among teetering, dusty shelves, he notices something odd: the books move on their own! He rushes to tell Uncle Tito, who lets his nephew in on a secret: Juan is a Princeps Reader, which means books respond magically to him, and...