The British author best known for his fantasy series about a young wizard is J.K. Rowling, who created the immensely popular Harry Potter series. Spanning seven books, the series follows Harry's adventures at Hogwarts School of Witchcraft and Wizardry and explores themes of friendship, bravery, and the battle between good and evil. Rowling's work has had a profound cultural impact, igniting a worldwide phenomenon that includes films, merchandise, and an expanded universe, captivating readers of all ages.