Gemma Halliday. Play Nice (2012) 258 pp.
Publishers description: Anya Danielovich was an assassin in her former life. But that was a long time ago. Today shes just Anna Smith—a single, thirtysomething woman living in San Francisco with a simple desire to lead a better life. But shes still haunted by her past—the people she killed, the mentor she betrayed, the woman she was. Shes taken care to cover her tracks, but shes beginning to feel like shes being watched. Nick Dade is a hired gunman—the best of the best. Hes read Anyas file and, after weeks of surveillance, hes ready to pull the trigger, until someone else beats him to the punch. With his agenda shattered, Nick suddenly finds himself thrown together with the woman hes been sent to eliminate.
Setting: San Francisco