Colbert, David. The Magical Worlds of Harry Potter
Fraser, Lindsey. Conversations with J.K. Rowling
Kronzek, Allan Zola, and Elizabeth Kronzek. A Sorcerer's Companion: A Guide to the Magical World of Harry Potter
Rowling, J. K. Fantastic Beasts and Where to Find Them
——— Quidditch Through the Ages
Schafer, Elizabeth D. Beacham's Sourcebook for Exploring Harry Potter