Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - General Late-game vendors selling every skillbok

I'm currently at Fort Joy but I'm wondering about the vendors in the final acts.

If I want to respec my character in the final acts into some skill school I havent tried earlier I want to be able to buy all the earlier and late-game skillbooks together. So my question is if the vendors also sell all the earlier skillboks or only the skillbooks the corresponds to the the level of the player?

Do I need to hoard all the skillbooks as I progress through the acts or do the vendors also sell all the previous skillbooks?

Thanks in advance!