I found the Resurrection Skillbook at a vendor and you can resurrect NPC with new loot. So you kan kill the vendor collect all the stuff, resurrect him and kill him all over again. You can do the same with the guard before the treasure and you can get infinte exp from it like really reviving the big orc and kill him again and so on. It should be removed. I killed with lv2 the vendor took his gold and the resurrect book and just killed the one guard over and over till i had really good weapons for my chars at lv3. The rest of the fights in the game were some kind of joke where i could decide when the fight is over.
The resurrection skillbook should be removed and only really powerful wizards should sell resurrection scrolls.