Harry Potter and the Deathly Hallows, the final book in the popular Harry Potter series by J. K. Rowling, was released and sold 15 million copies in its first 24 hours, making it the fastest-selling book in history.

Harry Potter and the Deathly Hallows is a fantasy novel written by British author J. K. Rowling. It is the seventh and final novel in the Harry Potter series. It was released on 21 July 2007 in the United Kingdom by Bloomsbury Publishing, in the United States by Scholastic, and in Canada by Raincoast Books. The novel chronicles the events directly following Harry Potter and the Half-Blood Prince (2005) and the final confrontation between the wizards Harry Potter and Lord Voldemort.

Harry Potter is a series of seven fantasy novels written by British author J. K. Rowling. The novels chronicle the lives of a young wizard, Harry Potter, and his friends, Ron Weasley and Hermione Granger, all of whom are students at Hogwarts School of Witchcraft and Wizardry. The main story arc concerns Harry's conflict with Lord Voldemort, a dark wizard who intends to become immortal, overthrow the wizard governing body known as the Ministry of Magic, and subjugate all wizards and Muggles.

Joanne Rowling, known by her pen name J. K. Rowling, is a British author and philanthropist. She is the author of Harry Potter, a seven-volume fantasy novel series published from 1997 to 2007. The series has sold over 600 million copies, has been translated into 84 languages, and has spawned a global media franchise including films and video games. She writes Cormoran Strike, an ongoing crime fiction series, under the alias Robert Galbraith.