Phishshtik

I just got back into the game after maybe 7 months of not playing, having my computer crash, reloading everything important, forgetting Avernum 3, and losing all memory of it until a week ago. Now i have a query: When I had the game last summer i remember that there were either scrolls or someone who teaches you dispell barriers but i can't find them and there a couple places that i can't get into like paulo's package and the place behind ghikra. Is there something i missed? Can someone help me out here ?