Private investigator Kinsey Millhone has served Sue Grafton well through 16 letters of the alphabet in a perennially popular series that occasionally breaks new ground but more often traverses familiar territory, as is the case here. Two old, ailing cops--one retired, the other disabled--try to breathe some life into an 18-year-old mystery that haunts them both for different reasons. They enlist Kinsey's help in identifying the victim, a young woman who was murdered and left for dead in the old quarry of the title. Neither they nor Kinsey expect that reopening an old case will incite the killer to strike again--not once, but twice. And while the real case of the still-unidentified victim that inspired this fictionalized scenario continues to languish in the cold case file in the Santa Barbara sheriff's office, Grafton's solution is as plausible as any. While the unlikely trio of Millhone and her cranky geezer sidekicks offers a few chuckles, the inner reaches of Kinsey's soul remain largely inaccessible to her as well as to the reader, which will probably not bother most of Kinsey's or Grafton's many admirers. --Jane Adams