I debated about how to classify this book because it doesn't fit the fantasy genre (no magic exactly, current day setting), nor the science fiction genre (only sort of science, current day - not future), so I settled on urban fantasy by default because it does fit the current day setting, but I think it might be better to think of it as an alternate reality mystery/thriller. (I probably need to just add a speculative fiction category and be done with it.)
Premise for the alternate reality: There are rare people all around the world naturally born with violet eyes (aka Violets) who can communicate with the dead. Or perhaps more accurately, who cannot ward off the spirits of the dead constantly trying to communicate to the world through them. The North American Afterlife Communication Corps (NAACC), as well as other organizations around the world, finds these people and trains them in their abilities. They then get jobs with various law enforcement agencies to help them solve murders, or become conduits for long-dead famous masters of the arts so that they can continue to create from the beyond. (And probably other things, too, but these are the only jobs mentioned so far.) Retiring from the NAACC to get out of one's assigned career is heavily discouraged.
In this book, the main character, Natalie, is brought in to assist the FBI in finding a serial killer targeting Violets. Somewhat creepy, but engrossing. All in all, a successful combination of two of my favorite genres. There are 3 other books in the series that I've added to my wishlist, too. I got the recommendation for this book from reading through back issues of Charles de Lint's book review column in the Magazine of Fantasy & Science Fiction when looking for new stuff I hadn't heard of, and it has paid off for me so far.