As much as Scalzi has the scientific creativity of a Michael Crichton, he also has the procedural chops of a Stephen J. Canell to craft a whodunit with buddy-cop charm and suspects aplenty--most of them in someone else's body. --USA Today John Scalzi returns with Head On, the standalone follow-up to the New York Times bestselling and critically acclaimed Lock In. Chilling near-future SF with the thrills...