Harry Potter and the Deathly Hallows is the seventh and final book of the Harry Potter series written by British author J.K. Rowling. The story follows Harry Potter on a quest to defeat Lord Voldemort and features themes of friendship, bravery, and the conflict between good and evil. As the last installment in the series, it resolves the overarching plot threads and character arcs established through the previous books. The novel is notable for its darker tone and complex characterization, culminating in the Battle of Hogwarts.