Okay, this wasn't REALLY a Harry Bosch book. It was a Mickey Haller book, I think book three of that particular series, maybe book two. I don't know. While the book itself was entertaining, and there's enough background to understand some of the Mickey Haller series, I was reading this book because it was a Bosch book. It wasn't really a Bosch book. Bosch is a secondary character to Haller, only part of the plot.
For the book itself, even though it wasn't what I was expecting, it was entertaining enough. There were a number of plot twists and quite a few, "And I figured it out for myself" Haller moments to get the gist of the Haller character. The book is written in the first person, which was great for explaining the actions and interpretations of Haller, as the main character. First person books done right are great reads. This was a fun read about how a courtroom might actually work. Having not been in a courtroom for anything more than a parking ticket, I can't say that it is or isn't an accurate portrayal of reality.
There's one big twist at the end of the book that I didn't see coming. I liked it.
I'll read the next Bosch book, even knowing that Haller comes back in two books, and that I probably should just stop reading this series. Still trying to get to book 19.
While this wasn't a Bosch book, per-se, it's on the Bosch list, and listed as book 14. There was only one mention of a tunnel, and hey, maybe a bad cop didn't do it, so maybe, just maybe, this isn't a Bosch book for-realz.
If you're reading the series, keep going. If you're not, start with books 1-3 to see if you like them enough to keep going. They're all pretty much the same book.