Flashpoint

A New York Times Notable Book: Cincinnati homicide detective Sonora Blair hunts a serial killer who's playing with fire in Shamus Award–winning author Lynn Hightower's chilling thriller
A single mother of two children and a police specialist with the Cincinnati Homicide Division, Sonora Blair is still awake in the middle of the night when the call comes in. Mark Daniels has been found in Mount Airy Forest handcuffed to the steering wheel of his car, doused with accelerant, and set on fire. As the hideously burned college student lies dying in the ER, he describes his killer: blond, female, and a total stranger.
 
But Mark may not have been the intended victim. Evidence points to a sexual fixation on his older brother, Keaton, a teacher currently separated from his wife. Then the murderer—who has been dubbed "Flash" by the media—calls Sonora one night, taunting and mocking her. As the investigation heats up, the harassment continues. The female psychopath knows intimate details about Sonora's family and her past. As the criminal's monstrous plan becomes chillingly apparent, Sonora must risk everything to corner a cunning killer.
 
Flashpoint is the 1st book in the Sonora Blair Mysteries, but you may enjoy reading the series in any order.