I think I read in the book of Enoch that Azaziel was one of the leaders of the angels who fell in love with woman in Genesis 6:2-4God sees the sin brought about by Azazel and has Raphael “bind Azazel hand and foot and cast him into the darkness: and make an opening in the desert — which is in Dudael — and cast him therein. And place upon him rough and jagged rocks, and cover him with darkness, and let him abide there forever, and cover his face that he may not see light.”
(from wikipedia)
I am going to a theological college with a Protestant bent, so the books of the Apocryha are not concentrated on. But I have always been fascinated with forbidden books.