In the Corleone family, there's Richie Gatto who's important. He's Paulie Gatto's father. Then Luca Brasi, before he joins the Corleone family has a whole gang of his own, like five characters. Tessio has guys working under him who aren't in the movie or book, and so does Clemenza. Frankie Pentangeli has guys with him, too. Then there are the other families and the Irish, so it's a pretty big cast of characters. Part of the story in the first section is how Luca Brasi comes to be so loyal to Vito. And Santino . . . Well, I don't want to give away anything in the book, but, yes, there are more Corleone family characters.