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Yes, I have a copy of Ethiopic Enoch and according to the preface, the book of Enoch used to be apart of the scriptures, which is why both Jesus and Jude quote from it. Enoch goes into great detail about those angels who sinned by taking wives from the daughters of men and thereby defiling themselves. And also goes into great detail in regards to the angels also teaching mankind about sorcery, divination, the dividing of roots and trees, astrology, how to make weapons of war, the use of paint and dyes, the beautifying of the eyebrows, etc. And because of this the world was altered. This was the reason for the flood, as well as to destroy the offspring of the angels, those giants.
Enoch goes into great detail regarding these events.