I think that primarily comes from Milton's Paradise Lost.
Biblical content about Satan is extremely sparse so about 99% of what people think they know about Satan comes from fiction.
Biblical content about Satan is extremely sparse so about 99% of what people think they know about Satan comes from fiction.
To your point, I wonder how much Satan plays a part in each of these classes of writings.
The first two chapters "The First Book of Adam and Eve" and the second, directly deal with their conflict with Satan.