I was really disappointed in this book. I love the Sharon McCone series, and I've read a couple of the Nameless Detective books by Pronzini and liked them as well, so I had high hopes for this one.
It seems that with the current vogue for "period mysteries," there seems to be a huge emphasis on the "period" and not so much on the "mystery." Fairly weak stories, characters who aren't particularly compelling, but loads of details to show how much the author has researched the period. For me, at least, if there's not a good story with an interesting mystery and interesting characters, I just don't care how many details the author(s) cram in.
The other thing that got tedious was that I sometimes felt that this was a street directory of San Francisco. Really? Do we need to know the name of every single street that is in any particular area, or that the characters ever walk on?