Which Harry Potter book did J.K. Rowling publish as a charity companion volume in 2008?

J.K. Rowling published The Tales of Beedle the Bard as a charity companion volume in 2008.

The book contains five wizarding fairy tales mentioned in Harry Potter and the Deathly Hallows. The most important for the final novel is “The Tale of the Three Brothers,” which explains the legendary origin of the Elder Wand, the Resurrection Stone, and the Cloak of Invisibility. Albus Dumbledore’s notes appear after each tale, adding historical and critical commentary.

Rowling wrote and illustrated the original manuscript by hand. Six handmade copies were produced, and five were given to people closely connected with the Harry Potter books. The sixth was auctioned in 2007, raising money for The Children’s Voice charity.

A mass-market edition appeared in 2008, with proceeds benefiting Children’s High Level Group, the organization later known as Lumos. The collection is therefore both an in-world wizarding book and a real-world charitable publication. It differs from Rowling’s earlier companion book Quidditch Through the Ages, which is presented as a history of wizarding sport.