Sinner Man, Paperback/Lawrence Block

LAWRENCE BLOCK'S FIRST CRIME NOVEL -- LOST FOR NEARLY 50 YEARS To escape punishment for a murder he didn't mean to commit, insurance man Don Barshter has to take on a new identity: Nathaniel Crowley, ferocious up-and-comer in the New York mob. But can he find safety in the skin of another man...a worse man...a sinner man...?