This is another ebook that I bought on Barnes & Noble's recommendation — I get emails from them every week — and absolutely loved. It was even better than I expected it would be, and I was pretty compelled when I read the description and the top reviews.
Knife Music is David Carnoy's first novel, but it is one hell of a debut novel. The suspense is amazing. With shifting viewpoints (all third-person) and alternating between past and present, it tells the story of a surgeon who is accused of raping a 16-year-old girl, an ex-patient who committed suicide 6 months after she was in the ER following a car accident. Carnoy really has you wondering for a while if he did do it, and even once you realize he didn't, you keep guessing for a long time as to who did. The end is a big surprise, too!
One of the reviews on Barnes & Noble's website compared the novel to Robin Cook's books. I haven't ever read hers, but maybe that will help you decide whether this is something you would like. I can tell you that I don't usually read mysteries or doctor-type books, and I loved it!