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.
A 2024 Edgar Award Nominee! A Best Fiction for Young Adults selection • A Kirkus Best Book of the Year • A Chicago Public Library Best Book of the Year • A Core Excellence in Young Adult Science Fiction selection “A twisty mystery of partial truths and unexpected reveals.″ —BCCB “The expertly juggled storyline nurtures a tension that blossoms into a palpable sense of dread as the downright spooky nature of the disaster is explored. Themes of identity hit hard, as they come with high stakes. An intense, read-in-one-sitting kind of ride.” —Kirkus, starred review “Dual timelines imbued with believable hard science, harrowing action, and strong characterizations permeate Kirby’s breakneck adventure. Questions of personhood are skillfully elevated, explored against an inventive future backdrop in which cloning is the norm and the potential consequences of deceptively simple-sounding procedures come at high costs.” —Publishers Weekly