Harry Potter Hogwarts Necklace *Quality metal construction with adjustable necklace *One size fits most *Officially licensed twilight *Cardboard packaging *Brand new Harry Potter is a series of seven fantasy novels written by the British author J. K. Rowling. The books chronicle the adventures of the adolescent wizard Harry Potter and his best friends Ron Weasley and Hermione Granger all of whom are students at Hogwarts School of Witchcraft and Wizardry.