The Godfather's Revenge (2006)

It's not that Mark Winegardner is a poor writer: He's pretty great, and The Godfather's Revenge, his second sequel to Mario Puzo's novel is everything it should be: nuanced, chilling, and threaded with intrigue (it's the 1960s, and the Mob becomes involved in a plot to assassinate a JFK-like president). But this book's very existence feels terribly wrong. Why can't dead authors stay dead? Robert Ludlum^TM books keep appearing in stores (he died five years ago) and V.C. Andrews® (Flowers in the Attic) spawned a posthumous industry. That said, if you simply have to read more about Michael Corleone, you probably won't be able to put this one down.