I've read my fill of mystery/suspense stories and I must say that this was one of the better ones, in my opinion. Although it was published in the mid 1800's, the story line still felt fresh. Lots of build- up and even midway through I was not knowing where we would go next. I don't want to say too much, as to what happens, as "the secret" is the primary focus of the novel.
What I can say is that I was kept guessing throughout. There was one point in the book where I thought something was going to happen and I had to hold my breath and keep turning pages. My guess was wrong, which I was happy to see.
The main characters were diverse and Lady Audley was portrayed perfectly; I would loved to see a photo of her. She is described as being incredibly beautiful, childish and doll-like, Robert Audley who plays the detective reminded me of a young Bruce Willis, laid-back, witty and forever the bachelor.
This was a very enjoyable, quick read and I will be checking out more of Braddon's work. I can imagine that this novel made her hugely popular at the time of it's release.