I know Vincent "Mancini" Corleone wasn't part of the timeline included at the beginning of the book, but I don't see him in the cast of characters at the beginning of the book. I bought The Godfather Returns when it first came out and finally decided to start reading it. Is he in The Godfather's Revenge?

You know, we always called each other good fellas. Like you said to, uh, somebody, :You're gonna like this guy. He's all right. He's a good fella. He's one of us.: You understand? We were good fellas.