It's items like these that make me want to start DMing in real life again. Of course I don't need another money sink between what I have for D&D already and video games. But ragged books and a human skull sitting near an old fashioned compass (I don't care if they don't have them in D&D) is just too cool. And no explaining needed. Players will know. They will know so very much. And their envy will no know bounds. As soon as they get over how dead their characters are.