A Six-Pack to Go

The first short story starts at the close of 1940 and ends in December 1941. The story depicts infamous organized crime members and how they operated. The protagonist happens to be the grandfather of the lead character of the title story, A Six-Pack to Go, PI Rollo Michaels. In fact, Rollo appears in the other stories as well. The book ends with a preview of Rollo Michaels: The Last Case because, when it's personal, you do what you have to do!