Harry Bosch has been given three years before he must retire from the LAPD, and he wants cases more fiercely than ever. In one morning, he gets two.DNA from a 1989 rape and murder matches a 29-year-old convicted rapist. Was he an eight-year-old killer or has something gone terribly wrong in the new Regional Crime Lab? The latter possibility could compromise all of the lab's DNA cases currently in court.Then Bosch and his partner are called to a death scene fraught with internal politics. Councilman Irvin Irving's son jumped or was pushed from a window at the Chateau Marmont. Irving, Bosch's longtime nemesis, has demanded that Harry handle the investigation.Relentlessly pursuing both cases, Bosch makes two chilling discoveries: a killer operating unknown in the city for as many as three decades, and a political conspiracy that goes back into the dark history of the police department.

Can Harry Bosch defend a man accused of murder without betraying everything he believes in?Six months ago, Harry Bosch left the LAPD before they could fire him, and then hired maverick Defense Attorney Mickey Haller to sue the department for forcing him out. Although it wasn’t the way he wanted to go, Harry has to admit that being out of the game has its benefits. Until Mickey asks him to help on one of his cases, and suddenly Harry is back where he belongs, right in the centre of a particularly puzzling murder mystery. The difference is, this time Harry is working for the defense, aiming to prevent the accused, Da’Quan Foster, from being convicted. And not only does the prosecution seem to have a cast-iron case, but having crossed over to ‘the dark side’ as his former colleagues would put it, Harry is in danger of betraying the very principles he’s lived by his whole career.

Harry Bosch is working as a part-time detective in the town of San Fernando outside of Los Angeles, when he gets the invitation to meet with the ageing aviation billionaire Whitney Vance. When he was eighteen Vance had a relationship with a Mexican girl called Vibiana Duarte, but soon after becoming pregnant she disappeared.Now, as he reaches the end of his life, Vance wants to know what happened to Vibiana and whether there is an heir to his vast fortune. And Bosch is the only person he trusts to undertake the assignment.Harry’s aware that with such sums of money involved, this could be a dangerous undertaking — not just for himself, but for the person he’s looking for — but as he begins to uncover Vibiana’s tragic story, and finds uncanny links to his own past, he knows he cannot rest until he finds the truth.