D is for Deadbeat
When Alvin Limardo walks into P.I. Kinsey Millhone's office, she smells bad news. He wants Kinsey to deliver a cashier's check for $25,000. The recipient: a fifteen-year-old boy. It's a simple matter. So simple that Kinsey wonders why he doesn't deliver the money himself. She's almost certain something is off. But with rent due, Kinsey accepts Limardo's as a client against her better judgment…
Limardo pays her with another check as the retainer. It bounces and Kinsey discovers she's been had. She learns that he is really John Daggett—an ex-con with a drinking problem, two wives to boot, and a slew of people who would like to see him dead. Kinsey is out $400 and she's now in hot pursuit of Daggett.
When Daggett's corpse shows up floating in the Santa Teresa surf, the cops rule it an accident. Kinsey thinks it's murder. But seeking justice for a man who everyone seemed to despise is a lot tougher than she bargained for—and what awaits her at the end of the road is much more disturbing than she could've ever imagined.
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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.

