Inspector Vincent Gratelli hunts a serial killer through San Francisco in this "dark, twisty little gem" from the author of the Deets Shanahan mysteries (Kirkus Reviews).   The Bay Strangler is at large in San Francisco. One after another, the lifeless bodies of young women are found beaten, sexually assaulted, and adorned with an intimate tattoo. Homicide Inspector Vincent Gratelli, and his partner, Inspector Mickey McClellan, are charged with finding the killer--a highly intelligent individual who appears to be expert at leaving no trace behind.   But the Strangler's latest victim, PI Julia Bateman, clings to life in a coma. As the media swarms and the entire city braces itself for the next attack, Julia may provide the evidence Vincent and Mickey need to catch the killer--if she survives long enough to talk.