I never understood why Raymond E Feist doesn't get more coverage - I know the books have been going very nearly 30 years and consist of 29 books but they are broken into normally 3 book sagas which would be perfect for a TV adaptation.
There were a couple of games a few years ago but like lotro and game of thrones these series don't actually lend themselves to games too well. Look at Skyrim - you make allowances for the plot the whole time (questions on dialouge tree which you have no idea where they came from ie "What's up with that orc?" what bloody orc I'm thinking). There's no real character interactions with other other people consistently - this is very much a single player quest with a few replaceable companions. Skyrim would make a lousy book as it stands, and any fantasy fiction saga would make a lousy game.