Two different people asked me about this book while I was reading it, which must indicate that the cover is attractive!
I said, in answer to their queries, something like: "Well, I'm up to the third in the series, and I've already got the next two, so yes, I would recommend them. They're good fun. It's the 19th century, there're vampires and werewolves, action and romance. I wouldn't claim they're the best books in the world, but they're good entertainment."
I wouldn't recommend starting with this one however - I think enjoyment would be greatly enhanced by getting to know the characters through the first two - without that, it might seem a little skimpy. Yes, the plot is quite silly, but there are some genuinely funny moments.