Which J.K. Rowling Harry Potter novel has the subtitle “The Half-Blood Prince”?

Harry Potter and the Half-Blood Prince is the J.K. Rowling novel with that subtitle.

Published in 2005, it is the sixth book in the main Harry Potter series. The story follows Harry during his sixth year at Hogwarts as he learns more about Lord Voldemort’s past and the magical objects connected to his survival.

The Half-Blood Prince is the identity used by the owner of Harry’s annotated Potions textbook. Harry benefits from the handwritten notes, while Hermione is more cautious about their source. The book eventually reveals that the nickname belongs to Severus Snape.

The title therefore points to both a mystery and a character’s family history. “Half-blood” describes a witch or wizard with one magical and one non-magical parent, while the “Prince” part comes from Snape’s mother’s surname, Prince.