Matthew J. Kirby is the critically acclaimed and award-winning author of the middle grade novels The Clockwork Three, Icefall, The Lost Kingdom, Infinity Ring Book 5: Cave of Wonders, and The Quantum League series, the Dark Gravity Sequence, and the Assassin s Creed series, Last Descendants. He was named a Publishers Weekly Flying Start, he has won the Edgar Award for Best Juvenile Mystery, the PEN Center USA award for Children s Literature, and the Judy Lopez Memorial Award, and has been named to the New York Public Library s 100 Books for Reading and Sharing, and the ALA Best Fiction for Young Adults lists. He is also a school psychologist, and currently lives in Utah with his wife and three step-kids.