Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Mods [Main Campaign Mod] All Skillbooks Purchasable

1) Are you activating any other mods as well? Multiple mod activations will introduce conflicts

2) In your save game, did you already talk to the NPC you're looking to buy a book from at your current level already? NPCs don't restock their inventory unless you have leveled up since you last talked to them.