A hard-cover debut for Delilah West--an Orange County p.i. so hard on her luck that she lives in her office, showers at friends' places, and eats mostly candy bars. Here, Delilah witnesses a hit-and-run; and when old-timer Joseph Collins dies, she becomes the cops' case against Michael Morales, the driver. Then the zinger: Morales' mom believes in her son and hires Delilah to find out what really happened. Suddenly, Delilah gets a fancy job offer (private security to wealthy housing-developer Erik Lund-strom); the folks at Greenspace, an environmentalist group that Collins visited just before he died, won't talk to her; and Collins' so-called friend Lucy turns out to be the little old conniving granny whom Delilah caught shoplifting a while back. Eventually, the red herrings disperse, Delilah's love life perks up, and, after an improbable bashing about, Morales' mom can smile again--and Delilah can eat regularly. Fast, fluent, and diverting, even though the sweet/tough granny act is hard to swallow, and Delilah's thought processes border on the cutesy.