What is the title of J.K. Rowling’s 2008 charity book about the history and rules of wizarding sport?

Quidditch Through the Ages is J.K. Rowling’s 2008 charity book about the history and rules of wizarding sport.

The book was published in 2001 in the fictional world as a Hogwarts library textbook and in the real world as a charity companion volume. Rowling wrote the real-world edition under the name Kennilworthy Whisp, a fictional Quidditch historian. It explains the sport’s equipment, positions, rules, and development.

The real book was issued alongside Fantastic Beasts and Where to Find Them to raise money for Comic Relief. The editions were presented as reproductions of Hogwarts books, including fictional ownership marks and notes from Harry Potter and Ron Weasley.

Quidditch is played on broomsticks by two teams of seven players. Its distinctive equipment includes the Quaffle, two Bludgers, and the Golden Snitch. The title is sometimes confused with fictional sports references elsewhere in the series, but it is the specific companion book devoted to Quidditch.