Seranella's lady mechanic is back fixing cars and catching criminals in this fourth Munch Mancini crime novel (Unwanted Company, etc.), featuring the spunky auto-repair gal and her sidekick, Det. Mace St. John. In mid-'80s L.A., Munch, mechanic to the rich and famous, is distraught when a customer, philanthropic socialite Diane Bergman, is found dead on the side of the freeway, dressed in a negligee with electrocution marks on her body. The details of Diane's murder resemble a rape case Mace has been investigating for a few months; when he discovers that a third case suggests the same modus operandi and that the victim, Robin Davies, is also a customer at Munch's garage, the mechanic and the cop join forces once again. Along with her friend D.W. from the Meals-on-Wheels program, Munch tries to comfort Robin, who has not left her home since being raped. As soon as Robin begins to accept support, Munch starts getting threatening phone calls from the rapist, who knows too much about her life and the routine she follows with her seven-year-old adopted daughter, Asia. Robin disappears, Mace has a heart attack and suddenly Munch is left alone to catch the bad guy. More threats to Munch and her daughter follow, to everyone's dismay, yet the reader feels little trepidation. A cast of one-dimensional secondary characters take their places as stock suspects until the perpetrator's identity is revealed with little clue as to a motive. All flaws considered, Munch is a likable protagonist, and Seranella's 20 years as a mechanic puts an unusual spin on this series. Yet among so many other crime novels boasting strong heroines, this one doesn't stand out. (May 22)