In the wake of the F.B.I. finding that ""crime has increased five times as fast as the population in the last five years,"" and in the belief that at least once in his or her lifetime every American citizen faces serious crime from mugging to murder, George Hunter offers a calm but not cool assessment of protective devices. At home there are tumbler locks on the outside door and a locked security room with weapons and phone readily available; on the street there are alarms and holds (photographed). He is in favor of firearms for the initiated (veterans, for instance). He gives a conservative guide to the law of self-defense, discusses the pitfalls of badger games when the protector is really the victim, the good samaritan doctrine, when homicide is excusible, goes into weapons laws. Selecting and training a defense dog, protecting children from sex perverts, abduction, drug pushers, are also on the roster. All this may not make the reader feel more secure, but he will definitely be more secure and aware following Mr. Hunter's advice judiciously.