The Cain Directive. The Cain Series, #3

Cain, still reeling from the attack on his girlfriend, gets even more suspicious of Project Specter when they send him to Russia to find Dmitri Kurylenko, a man he has already secretly killed. After another attempt on his life, he soon learns of the agency's involvement in keeping his memory from him and sets to meet with a man who seems to know everything. Unfortunately for Cain, Specter showed up first and framed Cain for murder.
Now, on the run, he must protect those close to him, while also trying to prove his innocence. In his quest to take down Project Specter, Cain turns to the only man he can trust for help, Eric Raines, a man Specter wants almost as badly as Cain, and a man as equally bent on taking down Specter as he is.