A cop races against time to prevent his own death in this heart-pounding thriller from #1 New York Times bestselling author Dean Koontz. Harry Lyon is a rational man, a cop who refuses to let his job harden his soul. His partner urges him to surrender to the chaos of life. But Harry believes in order and reason. Then one fateful day, he's forced to shoot a man-and a homeless stranger with bloodshot eyes utteres the haunting words that challenge Harry Lyon's sanity... "Ticktock, ticktock. You'll be dead in sixteen hours...Dead by dawn...Dead by dawn...Dead by dawn..."