Mass Effect books do this perfectly...While they are not related to the games what so ever...they provide a deeper view into the universe for those who want it, while making it non essential to enjoying the games. every single RPG genre should do this sort of thign.
Well, the Mass Effect books were written by Drew Karpyshyn, who is a person that works for Bioware since Baldur's Gate II, he's also the one that had a big influence in the creation of the Mass Effect Universe.
I think the only way to make good fallout novels would if one of the people who deeply participated in the Fallout games decided to start making novels.
That's why those Armageddon rags I posted above are the closet thing to a Fallout novel, they were written by Chris Taylor.