This is one series where every single one of the books have worked for me - some I've liked more than others, but I've enjoyed each and every one.
Promises in Death was no different. I opened it as soon as it came into my hands, and read it in one sitting. The mystery element was complex and interesting, but it was the emotional component - Eve and Roarke's relationship, their ties with the others in their world - that really made it stand out.
I simply don't know how JD Robb does it, but with each book, I simply fall more in love with the dynamics of this world and the people in it. This is absolutely recommended.
If you haven't read this series, I'd suggest starting with the very first one Naked in Death. While each mystery stands on its own, you'll enjoy the relationships so much more if you see them develop over the books. Also, this particular mystery does have a tie to an earlier book.
So, who else is a JD Robb fan? Who's your favorite secondary character?