The Ian Fleming Estate owns the literary rights. They keep cashing in by licensing new novels. I've only read three non-Fleming Bond books: Colonel Sun, James Bond: An Autobiography, and, I think it was License Renewed (which was pretty bad).
The studio that co-owns the rights with the Broccolis eventually bought the rights to Casino Royale and whatever they didn't yet own of Thunderball/Never Say Never Again, so all the rights are under one roof now.
Thanx Which studio is that? MGM?