Harry Potter exhibit marks 20th anniversary of first book

A member of British Library staff poses with a crystal ball for a picture at the “Harry Potter - A History of Magic” exhibition at the British Library, in London, Wednesday Oct. 18, 2017. The exhibition running from Oct. 20, marks the 20th anniversary of the publication of Harry Potter and the Philosopher’s Stone, showing items from the British Library’s collection, and items from author J.K Rowling and the book publisher’s collection. (AP Photo/Tim Ireland)

A member of British Library staff poses for a picture at the “Harry Potter - A History of Magic” exhibition at the British Library, in London, Wednesday Oct. 18, 2017. The exhibition running from Oct. 20, marks the 20th anniversary of the publication of Harry Potter and the Philosopher’s Stone, showing items from the British Library’s collection, and items from author J.K Rowling and the book publisher’s collection. (AP Photo/Tim Ireland)

Chinese Oracle bones, the oldest dateable items in the British Library’s collection from 1192 BC, on display at the “Harry Potter - A History of Magic” exhibition at the British Library, in London, Wednesday Oct. 18, 2017. The exhibition running from Oct. 20, marks the 20th anniversary of the publication of Harry Potter and the Philosopher’s Stone, showing items from the British Library’s collection, and items from author J.K Rowling and the book publisher’s collection. (AP Photo/Tim Ireland)

A member of British Library staff poses for a picture pointing at the Philosopher’s Stone on the 16th-century Ripley Scroll, which describes how to make a Philosopher’s Stone, at the “Harry Potter - A History of Magic” exhibition at the British Library, in London, Wednesday Oct. 18, 2017. The exhibition running from Oct. 20, marks the 20th anniversary of the publication of Harry Potter and the Philosopher’s Stone, showing items from the British Library’s collection, and items from author J.K Rowling and the book publisher’s collection. (AP Photo/Tim Ireland)

LONDON — Harry Potter fans owe a debt of gratitude to Alice Newton.