They could do a more tuned version of what bethesda did in Daggerfall: some books gave experience in a due area. I said that the method have to be tuned because in Daggerfall the experience was given regardless of the class (that is a pure wizard could gain points in heavy weapons), books that gave experience based on the class would be nice (for example a dark cleric could gain a bit of xp from a religion related book, a ranger from those about exploration, and so on.. ...)
