Q Is for Quarry — Sue Grafton

Back in 1969, a lot of young people were hitting the road and disappearing. More than one of them wound up dead--including the girl in daisy-patterned pants who was found in a quarry off Highway 1 in Lompoc, the victim of multiple stab wounds. Eighteen years later, she's still a Jane Doe--and the cops who found her are still haunted by the case. Anxious to solve it, but no longer in their prime, they turn to Kinsey Millhone for help. If nothing else, they'd just like to identify the body. But this ice-cold case heats up more quickly than they expect. And for Kinsey, it will lead to a lot of dangerous discoveries--including some about her own past ...