The author of the cheerful series featuring Bonnie Indermill (Island Girl, etc.) is on a different tack here. Her heroine now is Joyce Neuhauser, a youngish mother of four just released from a psychiatric hospital after treatments, including electroshock, for severe depression. Unsure of herself, her memory impaired, Joyce is nevertheless the guiding force in the search for her kidnapped 13- year-old daughter Deborah. Thirtysomething, ordinary-seeming Ronnie Haddon first sees Deborah in a Cape Cod general store where the Neuhauser family has stopped on the way to their vacation apartment. Deborah innocently plays into his crazy delusions and, after a brief contact, becomes an overriding obsession that pushes Haddon to murder, then to the pursuit of his quarry. It's Joyce whose sharp observation, stubborn questions, and piecemeal memories set the police on the right track.... Crisp pacing, vivid minor characters, and a chilling psychological profile add up to absorbing storytelling that showcases a versatile talent.