The Overlook by Michael Connelly

It has been a dry spell, now homicide detective Harry Bosch has been called to the scene of an execution-style shooting. His new partner, Iggy Ferras, is hesitant to follow Harry's lead as Harry's reputation has followed him to this new position at LAPD. Due to the victim's work with radioactive capsules, the FBI arrives on the scene looking at the murder as a terrorist action. Leave it to Harry, ever vigilant, to determine that the officials are being played. When FBI agent Rachel Walling arrives on the scene Harry doesn't know whether to breathe a sigh of relief or be wary. Connelly again writes a great murder mystery.