Echo Park. Michael Connelly. 2006.

In 1993, Harry Bosch was assigned the case of a missing person, Marie Gesto. The young woman was never found-dead or alive-and the case has haunted Bosch ever since. Thirteen years later Bosch is in the Open-Unsolved Unit, where he still keeps the Gesto file on his desk, when he gets a call from the DA's office. A man accused of two heinous killings is willing to come clean with regard to several other murders in a deal to avoid the death penalty-including the killing of Marie Gesto. Bosch must get close to the man he has sought-and hated-for thirteen years. And then he is confronted with the fact he missed a clue back in 1993 which could have stopped the nine murders that followed the killing of Marie Gesto.......