Title: Los Angeles River - Michael Connelly - book
Summary :
At the request of Terry McCaleb's widow, former LAPD detective Harry Bosch agrees to clean up the deceased's papers. Suspicious after revelations from one of McCaleb's associates, he investigates and realizes there was a murder. But he still has to prove it and find a killer who left such obvious traces that it seems he wants to get caught... Meanwhile, FBI agent Rachel Walling receives the call she's been dreading for years: the most cruel and devious killer she's ever hunted, namely... the Poet, is back. When Michael Connelly's greatest hero, Harry Bosch, faces off against his most famous assassin, the Poet... A clash of titans!