El eco negro (The Black Echo)

When Harry Bosch—former hero cop bumped from the L.A. homicide desk to the lowly Beverly Hills squad—gets the call on a death at Mulholland Dam, he recognizes the corpse as that of a fellow soldier in Vietnam. Together they had searched for Viet Cong in burrows beneath Vietnamese villages, and had both experienced the "black echo" of their own panic reverberating in their ears. Further investigation connects his old pal to an unsolved bank job—storm drains tunneled into the bank vault. When Harr…