It's a bit of a rabbit trail I'm creating with this comment, but it bums me out that Harry Bosch is now an old man and--while younger detectives like Renee Ballard appreciate his brain power--his physical stamina and the generally physical nature of his job are being written out or written down to acknowledge this fact. I like the supporting cast of characters of earlier Connelly novels--J. Edgar, Crate and Barrel, Renee Ballard, and many others, but the genius of Connelly's books (and his greatest character, by far) is Harry Bosch. Other series Connelly has written (Mickey Haller, Jack McEvoy, and now perhaps Ballard as well) just don't carry the dynamism of the Harry Bosch books, at least in my opinion.
Rex Stout created the timeless characters of private detective Nero Wolfe and his inimitable investigator, Archie Goodwin. The genius of the Wolfe books is that neither Wolfe nor Goodwin--nor anyone else in the series--get older. Yes, the storylines evolve from the 1930s when Stout began writing the series and all the way through to the early 70s before Stout died. But the reason the books are still widely read is that Wolfe and Goodwin are just as vibrant and highly capable in the last novels as they were in the first--so much so, in fact, that Robert Goldsborough later took up the mantle and authored another 16 Nero Wolfe novels after Stout died. Sadly, that won't be possible with Harry Bosch.