Road to Perdition — Max Allan Collins

THEY CALL HIM THE ANGEL OF DEATH.
His real name is Michael Sullivan, professional hit man bound to the criminal underworld of the 1930s and an enigmatic idol to his adoring young sons. He's a man who knows that loyalties vanish in the dark -- a violent lesson learned one rainy night when his wife and youngest son are killed. Now Sullivan and his last surviving child are about to face off against the most notorious crime syndicate in history -- on a journey of revenge and self-discovery.