Minneapolis PD Deputy Chief Lucas Davenport, seen last in Night Prey, carries on as a smart, quirky hero in the seventh "Prey" book. When psychiatrist Andi Manette and her two young daughters are kidnapped, Lucas must discover whether it's a ransom snatch, the work of one of Andi's ex-patients or the ruse of someone in her life who might benefit from her death. (Her father, stepmother, estranged husband and medical partner are all good suspects.) Readers know the kidnapper is John Mail, a scary ex-patient who's entertained nasty dreams of Andi for years. He enacts his violent sex fantasies with the imprisoned Andi; it seems only a matter of time before he will go after the girls. Lucas, meanwhile, draws on all available resources, including his own computer game company, to flush out Mail, a gamer who enjoys taunting Lucas with phone calls. During this time, Andi has been trying to maintain an element of control and contrive an escape. Sandford expertly ratchets up the suspense from beginning to the brutal finish. Lucas does get his villain, but no one comes out of this experience unscarred. Literary Guild main; Doubleday Book Club alternate. Copyright 1995 Reed Business Information, Inc. -- PUBLISHERS WEEKLY.