Bad medicine makes good plotting in John Lescroart's latest, which brings back lawyer Dismas Hardy and his best friend, homicide cop Abe Glitsky. A string of suspicious deaths at a San Francisco HMO don't look like murder at first--until Tim Markham, the head of the HMO, dies from injuries received in a hit-and-run accident. But did the injuries really kill him? Glitsky believes that Hardy's client, Dr. Eric Kensing, killed his boss. Kensing had at least two good reasons: not only was Markham having an affair with his wife, but his cost- cutting restrictions were threatening the lives of Kensing's patients. Kensing is a bit too heroic for the reader to ever believe in him as a suspect, and the real murderer is pretty obvious from the get-go, which cuts down the suspense. Still, the reappearance of Glitsky and Hardy will be welcomed by Lescroart's many fans, who'll be delighted with the widowed cop's new wife and new life and happy to see the guys back in familiar if well-trodden territory. --Jane Adams