The Godfather`s Revenge

REVENGE OF WHAT??? Who will be the enemy in this book? Osvald Altobello?
Will Nick Geraci have a partnership with him to plot against Michael?

Does anybody know if he has an official site, or know of one that talks about this book?

you can check http://www.markwinegardner.com but I don`t think it is going to get deeper in this book.