This is book 5 of the "Stone Barrington" series.

This note contains spoilers for the book.

A weird bunch of murders that might be related, and Stone is right in the middle of it. One of them is a woman he just met at a party, who is dead when he gets back to her apartment after picking up dinner. Another is his secretary

It goes back to a guy they put away years ago, and a relative, and it's weird. Revenge tragedy, with our guys the victims (or nearly).

Also gets Stone involved with Dolce Bianchi, sister to Dino's wife and daughter of Eduardo, who everybody believes is a tip-top mafia man who managed to go legit, to a large extent, and who has never been caught doing anything.

Oh, and Stone manages to scare off the painter he met in a previous book, after her gallery opening is bombed. She flies off to England and he doesn't and it's over.