In the LAPD's Open-Unsolved Unit, not many murder victims die almost a decade after the crime. So when a man succumbs to complications from being shot by a stray bullet nine years earlier, Bosch catches a case in which the body is still fresh, but all other evidence is virtually nonexistent.

Detective Renee Ballard is working the graveyard shift again, and returns to Hollywood Station in the early hours only to find that an older man has snuck in and is rifling through old file cabinets.The intruder is none other than legendary LAPD detective Harry Bosch, working a cold case that has gotten under his skin. Ballard kicks him out, but eventually Bosch persuades her to help and she relents. Bosch is investigating the death of fifteen-year-old...

"Detective Harry Bosch has retired from the LAPD, but his half-brother, defense attorney Mickey Haller, needs his help. The murder rap against his client seems ironclad, but Mickey is sure it's a setup. Though it goes against all his instincts, Bosch takes the case. With the secret help of his former LAPD partner Lucia Soto, he turns the investigation inside the police department. But as Bosch gets closer to discovering the truth, he makes himself...

Detective Harry Bosch investigates a cold case and the murder of a city councilman's son. The cases are unrelated but they twist around each other like the double helix of a DNA strand. One leads to the discovery of a killer operating in the city for as many as three decades; the other to a deep political conspiracy that reached back into the dark history of the police department.