It's always darkest before the dawn ... Experimental psychologist Jim Marchuk has developed a flawless technique for identifying the previously undetected psychopaths lurking everywhere in society. But while being cross-examined in court about his breakthrough, Jim is shocked to discover that he has lost his memories of six months of his life from twenty years previously — a dark time during which he himself committed heinous acts. Jim is reunited with Kayla Huron, his forgotten girlfriend from his lost period. She is now a quantum physicist and has made a stunning discovery about the nature of human consciousness. As a rising tide of violence and hate sweeps across the globe, the psychologist and the physicist combine forces in a race against time to see if they can do the impossible — change human nature — before the entire world descends into darkness. Winner of Canada's Aurora Award for Best Science Fiction Novel of the Year - A Main Selection of The Science Fiction Book Club - Starred review in Publishers Weekly - #1 Locus bestseller - Maclean's bestseller " Quantum Night is a fast-paced thinking-person's thriller richly informed by modern science. Sawyer has certainly done his homework about psychopaths and he understands well that, far from being just the occasional headline-grabbing serial killer, they're everywhere." — Kevin Dutton , author of The Wisdom of Psychopaths "What a great, provocative read! From quantum physics to the philosophy of mind, Sawyer's latest novel will leave you pondering deep questions long after you turn the final page." — Dan Falk , author of In Search of Time "Hugo and Nebula Award-winning author Sawyer's latest work is a fast-moving, mind-stretching exploration of the nature of personality and consciousness; it balances esoteric speculation with action and character. Sawyer is very good at grounding the technical speculation in personal conflict, as Marchuk's utilitarian principles struggle with his emotional impulses." — Publishers Weekly (starred review, denoting a book of exceptional merit) "Really good. Just the sort of science fiction I'd like to be writing myself if I had the time." — John Gribbin , author of In Search of Schrödinger's Cat "The publisher is marketing this release as a technothriller as much as a science-fiction novel. But Sawyer does it a lot smarter and deeper than is typical of such fare. Thriller fans, science-fiction nuts, armchair philosophers, and psychology teachers alike should enjoy it." — Winnipeg Free Press "A truly remarkable work; one of Sawyer's best. An essential read for anyone interested in the science (and philosophy) of human consciousness, and simply a great dramatic thriller to boot." — James Kerwin , writer and director of Yesterday Was A Lie " Quantum Night is stuffed with thought. To be more specific, it is stuffed with the stuff of thought. Sawyer is experienced in making complex ideas accessible, and the story here moves briskly through a series of unexpected twists while challenging us to think about the nature of who we really are." — Toronto Star "Mind-blowing. What Sawyer does, possibly better than anyone else, is take a new scientific theory and extrapolate its real-world effects to their logical extremes. Then he tosses some Canadian, Star Trek -quoting academics at it to see what happens. The ideas that run through his story and the relentless examination of how those ideas might affect the world kept me thinking about this book long after I put it down." — Daytona News-Journal Originally published in hardcover by Ace Science Fiction (US) and Penguin Canada