Reread and bumped up a star. Harry Bosch's first post retirement cold case involves solving a murder related to one of his earlier cases. Despite the mostly procedural vs action sequences, it maintained a high tension level. Newly introduced computer technology of only 10 years ago (like "key word search") sounds corny now but this was back when Google was just new. Also a new player is the FBI, retasked with preventing terrorism, throwing its weight around. The ending is a surprise that shows Harry off to a new direction. 4 Stars