The Last Coyote by Michael Connelly

After being put on involuntary stress leave for attacking his boss, LAPD detective Hieronymous "Harry" Bosch tackles the 30-plus-year-old murder case of a Hollywood prostitute?his mother. Bummed out by the failure of his latest romance as well, Harry faces a deeper, psychological crisis: his life's "mission" may end if he solves the case. Harry continues, nonetheless, soon discovering that the police and politically powerful others purposely glossed over his mother's murder. With prose that cuts to the quick, a masterfully interwoven plot, and gripping suspense, Connelly renders a fitting sequel to The Black Echo