Dirty martini

Lieutenant Jacqueline "Jack" Daniels, the insomniac Chicago cop with a train wreck of a personal life, has trouble on her hands, and it isn't just because her boyfriend Latham wants to get married and she's not sure she's ready. A man in disguise has been visiting restaurants, grocery stores, and fast food places, ingeniously spreading a deadly toxin. Chicago's newest criminal calls himself The Chemist, and he has murder on his mind. When Jack finds Latham unconscious on the floor of their apartment with toxin-laced takeout on the counter, it looks like someone has plans for her. Add to that her dead father who actually isn't dead, her favorite partner, Herb Benedict, contemplating a transfer out of the police station, and a plot to poison all the cops in Chicago, and Jack is in for a scary ride.--From publisher description.