The Biblical Theology of Satan and Demons

"A biblical theology of satan and demons doesn't make any sense," says the author. "The serpentas actually a supernatural being who was real and who opposed god's programm", he adds. The book also claims there is no element of supernatural conflict in the old testament, but what about genesis three? How about daniel ten? No conflict? Daniel 10? It comes from deuteronomy 32, eight, nine, deuteronomy32 17.