Michelle Harison Author photo Michelle Marie Harrison (born 21 December 1979) is a British writer whose debut novel, The 13 Treasures, won the Waterstone's Children's Book Prize and has been sold for translation in 17 countries. The 13 Treasures is the first part of a trilogy, which has continued with The 13 Curses and The 13 Secrets. Her fourth novel and first book for young adults is Unrest, a ghost story published by Simon & Schuster in 2012.