The Ultimate Wizarding World History of Magic: A comprehensive chronicle of the Harry Potter universe through the ages

The Ultimate Wizarding World History of Magic: A comprehensive chronicle of the Harry Potter universe through the ages (The Unofficial Harry Potter Reference Library)

The Ultimate Wizarding World Guide to Magical Studies: A comprehensive exploration of Hogwarts's classes and curriculum (The Unofficial Harry Potter Reference Library)

The Unofficial Harry Potter Hogwarts Handbook: MuggleNet's complete guide to the most famous school for wizards and witches (The Unofficial Harry Potter Reference Library)