The biblical library of the Essene at Qumran was kept in eleven man-made caves with a shelving system and hidden entrances. Its contents, popularly known as the Dead Sea Scrolls, were repressed for decades following their rediscovery, and it is possible that some finds are still kept secret.
Based on the scroll fragments that have been released, the books of Enoch and Jubilees were the third (twenty-five copies) and sixth (twenty-one copies) most common in the library. These two books provide rich accounts of angels coupling with humans and producing hybrid offspring (Nephilim), the magical bloodlines of this novel. Brief direct references to the Nephilim remain in some modern versions of the Bible, such as the English Standard Version.