Demonology

Demonology is the study of Evil Spirits and the world of demons which tells about their kingdom and their thoughts towards human beings and other worlds. It is a systematic study of demonic creatures and the beliefs that are present about them. Its a study of supernatural beings that are not Gods.

Shaitan

Demons are in many cultures, so the information presented in demonology will cover all of this. There is a large list of demonic beings in this universe.