Quidditch Through the Ages is a book by Kennilworthy Whisp (a pseudonym for J.K. Rowling) detailing the history, evolution, rules, equipment, and cultural impact of Quidditch, the magical sport played in the wizarding world. The book covers everything from the sport's medieval origins on Queerditch Marsh to modern-day professional leagues, including famous teams like the Chudley Cannons, common fouls, and the development of racing brooms.