In response to the showrunners' quest for verisimilitude, the production was granted permission (a first) to film inside the actual L.A.P.D. Hollywood Station (1358 Wilcox Avenue) where the shooting was done late in the day after most of the detectives had left. Various off-duty police volunteered their time to play extras.
Besides bringing the literary basis for the show, Michael Connelly is also part of the writers' room.
Bosch has prints hanging on his wall based on fictional films of the Harry Bosch books by Michael Connelly.
In the literary world, Bosch is the half brother of Michael (Mickey) Haller from The Lincoln Lawyer (2011). They have the same father, also a lawyer, named Michael Haller. Michael, Jr. is the legitimate son, while Harry Bosch is illegitimate.
Exists in the same universe as Blood Work (2002), with Clint Eastwood. Eastwood's character, Terry McCaleb, was an FBI agent who had intersected with Bosch and Bosch's ex-wife Eleanor Wish (who is also an ex-FBI agent) in earlier cases.