[Carthego delenda est]

You’ve gotten me off on a search to learn more. On interesting thing I came across is that Jubilees states that God granted ten percent of the disembodied spirits of the nephilim to remain after the flood, as demons, to try to lead the human race astray until the final Judgment.

[RoosterRedux]

It's very exciting stuff...particularly when you connect the dots between scholars like John Mack (Harvard psychiatrist and professor, now deceased) and James Kugel (former Harvard professor, now in Israel).

Listen to Kugel on Jubilees and you'll get an idea of how important Jubilees is...

James Kugel at Pardes: 2 - The Book of Jubilees: the Oldest Commentary on the Book of Genesis.