To Have and Have Not by Ernest Hemingway

Harry Morgan is a tough guy making his living during the Depression from his motor boat in Key West, Florida. Although he normally takes out fishing parties, sometimes his boat can be put to other uses. If the money offered is worth his while, Harry will run guns, rum and men to and from Cuba.

But he is playing a dicey game. Hemingway's hardest hero risks not just his living, but his life.