Dark Hero — Peter Cheyney

AKA 'The Case of the Dark Hero'.
Tough and hard as the Ozarks that bred him, Rene Berg fought his way up through the gangs of Chicago during the days of prohibition. Then, at the peak of his power and success, he was framed by a beautiful woman and forced to flee for his life.
How this dashing, steel-nerved gunman turns up years later as the "dark hero" of the Norwegian Underground makes a story that will hold you spellbound. Thrill piles upon thrill as Berg pits his skill and courage, learned in the school of Chicago gangdom, against the vicious efficiency of the German Gestapo. And then, once again, he runs afoul of the lovely woman who betrayed him.