The Book of Jubilees by Thomas Horn
The Bible, as we hold it today, is esteemed by many religious institutions and especially Conservative Christians to be the inspired, inerrant Word of God. This doctrinal position affirms that the Bible is unlike all other books or collections of works in that it is free of error due to having been “given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: that the man of God may be perfect, thoroughly furnished unto all good works” (2 Tim. 3:16, 17).
While no other text can claim this same unique authority, Apocryphal and Pseudepigraphal literature such as contained in this volume of The Researchers Library of Ancient Texts (Volume One—The Apocrypha: Includes the Books of Enoch, Jasher, and Jubilees; also available on Kindle), provides literature that often precedes or follows the chronology of biblical texts, which frequently are used or assigned as supplemental works within academic settings to help students and scholars discover or better understand cultural and historical context within the Word of God. Whether or not the information contained in the apocryphal literature is entirely precise—as is the canon of Scripture—these ancient texts provide commentators’ valuable insight into what many ancient Jews and early Christians believed when, “God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets” (Heb. 1:1).
The Book of Jubilees narrates the Genesis of Angels from the first day of creation and the story of how a group of fallen angels created hybrid children which were in existence during the time of Noah, and who were wiped out during the great flood. But God granted 10 percent of their disembodied spirits to remain on Earth, in order to lead mankind astray at the end of time.
FROM WIKIPEDIA: "Jubilees covers much of the same ground as Genesis, but often with additional detail, and addressing Moses in the second person as the entire history of creation, and of Israel up to that point, is recounted in divisions of 49 years each, or "Jubilees". The elapsed time from the creation, up to Moses receiving the scriptures upon Sinai during the Exodus, is calculated as fifty Jubilees, less the 40 years still to be spent wandering in the desert before entering Canaan — or 2,410 years."