J.K. Rowling is the author of the record-breaking, multi-award-winning Harry Potter novels. Loved by fans around the world, the series has sold over 500 million copies, been translated into over 80 languages, and made into eight blockbuster films. She has written three companion volumes in aid of charity: Quidditch Through the Ages and Fantastic Beasts and Where to Find Them (in aid of Comic Relief and Lumos), and The Tales of Beedle the Bard (in aid of Lumos), as well as a screenplay inspired by Fantastic Beasts and Where to Find Them, which marked the start of a five-film series to be written by the author. She has also collaborated on a stage play, Harry Potter and the Cursed Child Parts One and Two, which opened in London's West End in the summer of 2016 and on Broadway in early 2018. In 2012, J.K. Rowling's digital company Pottermore was launched, where fans can enjoy news, features and articles, as well as original content from J.K. Rowling. She is also the author of The Casual Vacancy, a novel for adult readers, and the Strike crime series, written under the pseudonym Robert Galbraith. She has received many awards and honours, including an OBE and Companion of Honour, France's Légion d'honneur, and the Hans Christian Andersen Award.

Jim Kay won the Kate Greenaway Medal in 2012 for his illustrations in A Monster Calls by Patrick Ness. He studied illustration at the University of Westminster, and worked in the Library & Archives of Tate Britain and then as an assistant curator of botanical illustrations at the Royal Botanic Gardens at Kew before returning to producing art full-time. After a one-man exhibition at Richmond Gallery he was approached by a publisher and his freelance career began. Alongside his illustration work, Jim has produced concept work for film and television, and contributed to the group exhibition Memory Palace at the V&A Museum in London. The Illustrated Edition of Harry Potter and the Philosopher's Stone was published to international acclaim. Bloomsbury has commissioned Jim to illustrate all seven books in J.K. Rowling's classic series. Jim lives and works in Northamptonshire with his wife.

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