Poisonous Lucky Moves - Det. Lt. Nick Storie Mysteries, #6

Three books from the Det. Lt. Nick Storie MysteriesBad MoveNick gets involved with the Russian Mafia when an FBI agent is murdered. Even his gangster friends warn him against getting involved with them - but that wouldn't be Nick. Lucky StiffLuck has a way of turning sour. Maybe a killer's long lucky streak is about to run out. Name Your PoisonA truly exotic poison is killing people. The only connection Nick can find is on the internet, and that's tenuous, at best.
Does he have some new kind of serial killer here?