From the Ashes of Angels: The Forbidden Legacy of a Fallen Race

Mythology describes how beings of great beauty and intelligence, who served as messengers of gods, fell from grace through pride. These angels, also known as Watchers, lusted after human women, lay with them, and fathered giant offspring called the Nephilim. Andrew Collins reveals that these angels were flesh-and-blood members of a race who lived in Egypt (prior to the ancient Egyptians), before leaving the region for what is now eastern Turkey.