Michelle Harrison is a British author of middle grade and young adult fantasy novels. She is best known for her 13 Treasures trilogy, which follows the adventures of Tanya Fairchild as she discovers a magical world of faeries and other creatures. She has also written the N.E.R.D.S. series, a series of books about a group of spies with special powers, and The Time-Travelling Cat and the Egyptian Goddess, a time-travelling adventure.