Beautiful, blind Sherry Moore is matter-of-fact when telling two police detectives about her agonizing gift—the ability to see the last 18 seconds of a dead person's life. It's not supernatural, in her telling; it's science imperfectly understood. It's also the defining characteristic of Sherry's life; orphaned and injured at a young age, she cannot say no to the bereft who want her help in solving gruesome crimes. Shuman is a 20-year veteran of the Washington, D.C., police force, and his debut novel mercilessly depicts the horror wrought by serial killer Earl Sykes, who specializes in young women out for a good time at the New Jersey shore. Narrative relief from a litany of horrific crimes comes when the scene shifts to Sherry's tender relationship with a married police detective, and to police lieutenant Kelly Lynch-O'Shaughnessy's marital struggles. While the large number of characters and cross-cutting of their perspectives leads to occasional confusion, the vividly drawn central figures and authoritative voice keep the reader grimly committed. 100,000 announced first printing.(Apr.)