That is horrible reasoning Elwyn, because for mages certain spells are mandatory. Try winning a fight as a fire mage without fireball or firefly.
If you cannot get those skillbooks from vendors, you are pretty gimped.
To be honest, I have now done the area around Cyseal 2-3 times (almost) only with the starting skills of the characters (hard mode). Yes, fights get very tough but it is what I like. Otherwise, the abundance of spells and skills make the fights too easy for my taste. I am not arguing that vendors should definitely sell less books (it is now apparently bugged anyway), but any system which would put a restriction on how many spells you can learn would make a better balanced game in my opinion.
