Goliath
According to the Book of Enoch, 200 angels were tasked as Watchers to guide our species when humans were young. They deceived mankind and mated with human women and other animals, creating Nephilim - human/animal hybrids and giants. Their empire was so vast and powerful, the only way Yahweh could save humans was with a purging flood, intended to destroy almost everything.
I went to great lengths to use as many forms of information as possible, citing both holy and forbidden books. Full citation provided by way of chapter header quotes.
My email address is listed in the forward of this book, if you purchase this book and are unsatisfied let me know in at least a few sentences what you found to be lacking and I will mail you a money order for three dollars. I am that confident in my work and my belief that it will not waste your time.