Body Double by Tess Gerritsen is a Rizzoli and Isles mystery. A woman is killed in a car and she looks just like Maura Isles. Naturally, she’s shaken by this and responds by investigating the case. Isles is adopted and so it’s entirely possible the victim is related to her.
In the course of finding out who the murdered woman is, Isles meets a policeman who had been the victim’s lover and who develops a (slightly creepy) attachment to Isles. She and Rizzoli also discover some truly horrible crimes going back decades.
I don’t want to give the plot away. It’s nicely twisted and the connections are surprising. Gerritsen is a solid writer who creates believable characters. I enjoyed this, as I’ve enjoyed all of her books, and if you like thrillers, then you’ll like this.