Brisbane becomes more and more Swoonily Interesting as the book goes on, and I am hoping he does not become So Interesting that the narrator is excluded. Her naievety might have been exacerbated in this book by her inexperience as a detective, so might improve.
All in all, this had much more of a romance feel to it than the C.S. Harris Regency mysteries.
For once, I would like the male homosexuals not to be the root of all the problems, i.e., a gay man is the murderer because he was slighted in favor of a woman. *sigh* Besides making me annoyed on behalf of anyone who's gay and has to put up with this, it's overdone in historical romance. Once would be too much; and I've seen this plot at least four times, possibly more. Syphilis is no excuse. Get a new plot. Or give the poor bastards a happy ending. Something.
Other than that, I liked the book. I got the second one, just to see.