The most important currency in the Universe is energy. Attention, focus, emotions, love, fear. Everything revolves around that, because that's all there is. read more
The demons are fictional, of course. The real question is why authors have a fascination with demons and souls. It is an archetypical plot. The"Faust" story, in various forms has been a part of art and folkart since at least the 16th century. It is good story-telling. Everyone likes a high-stakes supernatural tale. read more