In 2017, J.K. Rowling, Bloomsbury, and the British Library came together to celebrate the twentieth anniversary of Harry Potter and the Philosopher's Stone. This collaboration resulted in an exhibition that takes visitors on a journey to the heart of the Harry Potter stories, as well as this special book. It gathers many strange, wonderful, and fascinating artifacts from the archives of the British Library, along with never-before-published treasures from J.K. Rowling's personal collection, inviting readers to rediscover the various subjects taught at Hogwarts School of Witchcraft and Wizardry—ranging from Astronomy and Potions to Charms and Divination. A variety of experts guide readers through each magical subject and into a treasure trove filled with exhibits from the British Library and other collections from around the world. One can delve into ancient spells.