In her most masterful novel of medical suspense, New York Times bestselling author Tess Gerritsen creates a villain of unforgettable evil--and the one woman who can catch him before he kills again. He slips into their homes at night and walks silently into bedrooms where women lie sleeping, unaware of the horrors they soon will endure. The precision of the killer's methods suggests he is a deranged man of medicine, propelling the Boston newspapers...

"Veteran reporter Jack McEvoy has taken down killers before, but when a woman he had a one-night stand with is murdered in a particularly brutal way, McEvoy realizes he might be facing a criminal mind unlike any he's ever encountered. McEvoy investigates--against the warnings of the police and his own editor--and makes a shocking discovery that connects the crime to other mysterious deaths across the country. But his inquiry hits a snag when he himself...