One theme of this excellent book are the violent excesses of the FBI post-9/11.

Lost Light is the ninth novel in Michael Connelly‘s Harry Bosch series. …

… the first novel set after Bosch retires from the LAPD at the end of the prior story.

Bosch investigates an old case concerning the murder of a production assistant on the set of a film. The case leads him back into contact with his ex-wife Eleanor Wish, who is now a professional poker player in Las Vegas, and Bosch learns at the end that he and Eleanor have a young daughter.