The next Michael Conelly novel (and a sequel to The Poet) sees a number of characters come together. Harry Bosch, now retired and a PI of sorts, is asked to investigate the death of retired FBI agent Terry McCaleb (who we met in Blood Work). This leads him to the desert and a possible link to the serial killer ‘The Poet’.
At the same time the FBI are follow leads to the same place and bring back special agent Rachel Walling (again from The Poet). The plot follows the investigation, official and off the books – with Rachel and Harry teaming up to find the bad guy.
There is even a cameo appearance from Cassie Black (Void Moon)