Memory — Donald E. Westlake

THE CRIME WAS OVER IN A MINUTE - THE CONSEQUENCES LASTED A LIFETIME
Hospitalized after a liason with another man's wife ends in violence, Paul Cole has just one goal: to rebuild his shattered life. But with his memory damaged, the police hounding him, and no way even to get home, Paul's facing steep odds - and a bleak fate if he fails...

This final, never-before-published novel by three-time Edgar Award winner Donald E. Westlake is a noir masterpiece, a dark and painful portrait of a man's struggle against merciless forces that threaten to strip him of his very identity.