JK Rowling is to release four brand new stories associated with the wizarding world of Harry Potter over 20 years after the first novel was published. The series of short e-books, set to explore the "traditional folklore and magic at the heart of the series", will be released by Pottermore Publishing. They're designed to focus on specific Hogwarts lessons, including Divination, Herbology and Defence Against the Dark Arts. The first two books — "A Journey Through Charms and Defence Against the Dark Arts" and "A Journey Through Potions and Herbology" - will be released on 27 June. "A Journey Through Divination" and "Astronomy and A Journey Through Care of Magical Creatures" are expected to follow soon after.