The assassins - Gayle Lynds

Recently retired from US military intelligence, Judd Ryder is walking home one evening when he sees a man wearing his clothes step out of his house. Moments later, the man is killed in a hit-and-run. Was the stranger the intended victim, or was it Judd himself?
Searching the man, Judd finds a phone with only one number dialled - to CIA trainee Eva Blake, Judd's former girlfriend. What Judd and Eva don't know is that they've unwittingly been trapped in a battle to the death against six professional assassins, and only one will be left standing....