David Colbert, The Magical Worlds of Harry Potter

Lindsey Fraser, Conversations with J.K. Rowling

Allan Zola Kronzek and Elizabeth Kronzek, A Sorcerer's Companion: A Guide to the Magical World of Harry Potter

J.K. Rowling, Fantastic Beasts and Where to Find Them

J.K. Rowling, Quidditch Through the Ages

Elizabeth D. Schafer, Beacham's Sourcebook for Exploring Harry Potter