Well I was thinking that skill books in NV give 3 points instead of 1 from the books from the Capital Wasteland, which makes sense since in NV the game tries to make you use Magazines so it makes the books more rare to find. But having access to the DC wasteland then the books are just way more common, since each give 3 points it becomes way easier to up some skills in less time, this is even easier if we pick the Perk Comprehension giving us 4 skill points in one book (for example: 20 skill points from 5 books). I don't really know but it seems that unbalances the game because skill books are more numerous around two wastelands 
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Maybe after TTW is released in the future there should be an option for original FO3 like books (1 Skill Point), FN like books (3 skill points) and Two Wastelands books (maybe in-between both, 2 skill points) or something like that. Now that I think about it maybe an optional mod or something.
Also about skill books (not related to balance), I always considered why would scribe Yearling pay for pre-war books that seem more like novels xD that actually useful books that contain quite a lot of knowledge like skill books that even if we are experts in some stuff like Science, Repairs, Medicine, etc we can always learn more from them (except if we Max out the skill xD ) so maybe we could sell skill books to her too or something. Again maybe an optional Mod.
Well I am just throwing ideas in the air around here so people can think about it 
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