Purity in Death is another Eve Dallas book. This is a fantastic series for those that like cop novels and a little science fiction at the same time. Lt. Eve Dallas is a homicide cop in New York City, but it's the New York City of the year 2059. This is book 15 of the In Death series. I recommend reading them in order but I haven't done that so you can jump in anywhere and enjoy the story. For background the right order would be better. Nora Roberts web site has all the information you need. Nora Roberts and J.D. Robb are the same person. Very highly recommended.
Note: do not listen to this book in the car while your grandchildren are present. The cop language and the steamy scenes (there are several) will have to be explained if you do. I learned this the hard way :(