J.K. Rowling is the author of the seven Harry Potter books, which have sold over 500 million copies, been translated into over 80 languages, and made into eight blockbuster films. She supports a wide number of humanitarian causes through her charitable trust Volant, and is the founder of the children's care reform charity Lumos.For as long as she can remember, J.K. Rowling wanted to be a writer, and is at her happiest in a room, making things up. She lives in Scotland with her family.

Jim Kay won the Kate Greenaway Medal in 2012 for his illustrations in A Monster Calls by Patrick Ness. Jim studied illustration at the University of Westminster and since graduating has worked in the archives of Tate Britain and the Royal Botanic Gardens at Kew. Jim has produced concept work for television and contributed to a group exhibition at the Victoria and Albert Museum in London. He now lives and works in Northamptonshire, England, with his wife.