The document summarizes the Harry Potter book series by J.K. Rowling. It discusses that the series revolves around the orphan Harry Potter, who discovers he is a wizard and attends the Hogwarts School of Witchcraft and Wizardry. The books were a global success, selling over 400 million copies worldwide. They chronicle Harry's struggle through adolescence as he learns to overcome magical, social, and emotional challenges at Hogwarts with his friends Ron and Hermione.