This was something of a surprise. It was a rather serious historical romance with a love triangle of Hero-heroine-alcohol (and a cameo by opium).
Jack and his siblings had seriously rotten childhoods and all of his self-destruction is rooted in his past. The reader doesn't know exactly what went on, but gets enough information to know there was some major trauma. Having said that, his "lost year" is glossed over a bit too much - what finally made him decide to leave the Baroness?
Anna is nicknamed "mouse" but by the end of the book, she is anything but.
Jack's addiction is handled realistically - there's no one magical moment when he leaps up sober and well, cured by the love of a good woman, in fact for most of the book, he has every intention of returning to the bottle for good. It's not quite up to par with Putney's The Rake, but it's good.
What took a star off for me was the whole landladies/Pinkerton wannabe plot line. That was silly. And the HEA was a bit quick after the previous chapter's angst and drama.