The Narrows is the 14th novel by American crime author Michael Connelly, and the tenth featuring the Los Angeles detective Hieronymus "Harry" Bosch.
The novel shifts points of view, cutting from Bosch's first-person commentary to the third-person perspectives of Walling and Backus.
Bosch meets a neighbor whom he later discovers (in the book The Closers) to be Cassie Black, the main character of Void Moon, and he begins a relationship with Walling.
He also accepts an offer from his old partner Kiz Rider to rejoin the LAPD under a new chief of police, as a homicide detective in the Open-Unsolved Unit within the department's Robbery-Homicide Division.
In fact, McCaleb had killed himself in a manner to make his death look accidental, as his heart transplant was failing, and he did not want to burden his wife and children with the crippling expense of additional medical procedures.