Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - General Good Game, but Frustrated by Random Skill Books

I'm struggling to understand why the skillbooks available from vendors in this game are subject to randomization. Right now I'm facing a game where all of the Aerothurge teleport spells plus the lightning bolt one have yet to make an appearance. I made my main (Cleric) character take Aerothurge mainly for those skills. Apparently that was a waste. Now I am reloading at a chest over and over trying to get at least one of them. Incredibly frustrating "feature." (Yes, the Jahan character has 2 of those skills preloaded but that is beside the point. This random feature seems to be present in all of the spells/abilities in the game and it really affects how much I enjoy the game when a character can't actually take advantage of a skill because the vendor is selling five (!!) copies of Immune to Electrified and not a single copy of basic low level spells.)

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