What is the title of the 2008 charity book by J.K. Rowling about Quidditch history and rules?

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

The book is presented as a Hogwarts library volume written by the fictional author Kennilworthy Whisp. It describes the development of the wizarding sport, its equipment, famous teams, and the rules used in matches. Harry Potter and his classmates are said to have consulted it at school.

Bloomsbury published the real book in 2001, with Comic Relief benefiting from its sales. A revised charity edition was issued in 2008 alongside The Tales of Beedle the Bard. The books were designed to raise money while expanding details of the fictional world.

Quidditch Through the Ages should not be confused with Fantastic Beasts and Where to Find Them, another in-world textbook. That book concerns magical creatures, while Whisp’s book concerns sport.