Paramount has sued the estate of the late novelist Mario Puzo, claiming copyright infringement for an unauthorized sequel to Puzo's legendary bestseller The Godfather. Paramount did work with the Puzo estate to release an official sequel in novel format, The Godfather Returns in 2004. However, they said a later sequel, The Godfather's Revenge and a future book titled The Family Corleone, are unauthorized. According to Paramount, Puzo, who died in 1999, sold the rights to all future film and literary stories based on The Godfather to Paramount as part of a 1969 deal that encompassed bringing the original book to the screen. The landmark 1972 film version starring Marlon Brando once held the spot as the highest-grossing film of all-time. Paramount says that the only rights Puzo maintained pertained to reprinting his original novel. For more click here