Rookie Cop — Richard A. Lupoff

America, June 1940. Nick Train has given up his dreams of a boxing championship after a brief and unsuccessful career in the ring. When one of his pals takes the examination for the police academy, Nick decides to join him. But what started out as a whim turns into a dangerous challenge, as Nick plays a precarious double game of collector for the mob and mole for a shadowy enforcement body... Will the rookie cop's luck hold?