Harry Bosch, Book 17
Okay, I have to say, Bosch has this most annoying habit of keeping all of his theories and suspicious to himself until he can play them out and confirm every little detail with them. I would f---ing hate working with him because of this trait. I want my coworkers to be working WITH me to an end goal, not hoarding knowledge and ideas that could help the rest of us achieve the goal we have set out for ourselves to accomplish.
This particular habit has become tiresome in this detective.
That all said, this was one of the better Bosch books. Oh, we had someone die. We might have even had a bad cop do it. And we most definitely had tunnels, though perhaps not in the most literal of ways.