S is for Silence
Cases don't get much colder than that of Violet Sullivan, who disappeared from her rural California town in 1953, leaving behind an abusive husband and a seven-year-old named Daisy. But PI Kinsey Millhone has promised the now adult Daisy she'll try her best to locate Violet, dead or alive. All signs point to a runaway wife—the clothes that disappeared; the secret stash of money Violet bragged about; the brazen flirtations she indulged in with local men, including some married ones.
Kinsey tries to pick up a trail by speaking to those who remember Violet—and perhaps were more involved in her life than they let on. But the trail could lead her somewhere very dangerous. Because the case may have gone cold, but some people's feelings about Violet Sullivan still run as hot as ever...
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Sue Grafton
In Sue Grafton's bestselling mystery series, hard-boiled detective Kinsey Millhone is an ex-cop and rebellious loner. Now a private investigator, she solves all the most difficult cases in (fictional) Santa Theresa, California.
In her 30s, Millhone ages one year every 2 1/2 books, from 32 in A to 38 in W. http://www.suegrafton.com/bookshelf.php
Sue Grafton died in December 2017, and her daughter said in the death announcement that Sue had not wanted a ghost writer to continue the series, so the series ends with book 25, Y is for Yesterday.
Kinsey Millhone
Kinsey Millhone consists of twenty-five books. The current recommended reading order for the series is provided below.

