The standard props are present: Lucinda is "on the shelf" with a scandalous reputation. In this case, she's 27, and rumored to have murdered some number of her father, her father's business partner and her fiance. Unsurprisingly, Gilbert Otford of the Flying Intelligencer's work appears. There's a series of murders. We've got people making and dying from variations on the Founder's Formula. We've got a man worried he is going crazy, and a woman quite calmly identifying the real problem and fixing it in passing. Cute carriages. Attempted abduction foiled by a well-prepared woman. Funny bits. Some sex. Blah, blah, bleeping blah.
Look. You know what you're getting when you read a novel by Krentz/Quick/Castle. If that's what you want, this is a perfectly acceptable entry. Not a good place to start reading her. I'm not sure why I _keep_ reading her, and I've probably read fifty or more books by her. Which, combined with the frequently appearing setting of Seattle (either the real one, or cities that are suspiciously like Seattle), may explain it after all.
ETA: Also, I went to one of her readings several years ago, and she's a really nice lady I don't mind giving my money to. At all.