In this book, Tom Grimm once again immerses himself in the magical world to rescue the most curious, fun and surprising facts about the most famous wizard of all time. Did you know that all the books in Albus Dumbledore's library seen in the movies are actually telephone directories with covers lined to make them look like old books? Or did you know that the credits of the movie Harry Potter and the Goblet of Fire explain that no dragons were injured during filming? A must for the true Potterhead and very useful for anyone who wants to find their way in the labyrinthine world of spells, this is the perfect guide to sneaking into Hogwarts Castle.