When does Harry Potter return?

Harry Potter is a series of seven fantasy novels written by British author J.K. K. Rowling. The novels chronicle the lives of Harry Potter and his friends, Hermione Granger and Ron Weasley, 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. The books have sold more than 600 million copies worldwide, making them the best-selling book series in history.