i have read it many times and some of the information in it is truly astonishing.
for example, my brother recently asked.. how are you supposed to get married if mankind is not supposed to know what an oath is* (the reason God hates oaths is allegedly mankind was never supposed to know how to make one, Moses compromises and says, well if you're going to make a vow, you must make it in the name of YAWH. Jesus says "anything more than let your yes be yes and your no be no comes from Evil" yet, the bible has at least a few examples of the most High swearing an oath by himself.
anyhow, my answer to him was.. well, that's self evident. you don't need a pastor/priest/government agent to sanctify your union, he has no authority underheaven.. Jesus took it all back.... allegedly...
anyhow.. yes i do believe perhaps a dozen spiritual concepts that are spoken of in Enoch to be self evidently true. *the example i gave above is one of them. allegedly, one of the fallen angels taught man how to make oaths. another how to make war, another how to make mirrors, birth control.. etc, etc.
however, not everyone can handle it. and i say that, speaking of people who cannot read the book of Revelation without becoming physically sick at everything it implies.
i do believe the book of Jasher points towards a prior technological civilization..
"in those days some of the men took from the cattle of the earth and taught the mixture of the seed thereof"
some of this stuff falls under the category of "you can't make this stuff up"
then again, the Sanhedrin had made a ruling that applies to artificial insemination today.. 2000 years ago. so, a lot of this stuff is not hard to figure out, man has thought about it for eons, and its impossible to know if a text is valid or not unless the prophecy made in it comes true. and even if it does, its not good enough given the promise made in Deut 13, which is that God will test you with false prophets.
but where i disagree with the book of Enoch is i think the angels that left their first estate, were sent here by God to teach mankind various kinds of things. some of those angels sinned, leading to Gen 6 and a lot of chaos.
its difficult for me to be certain but it would practically be impossible for anyone to say that einstein, feynmann, or other "gods of this age" did not have help from God, for his purposes.
so if an angel gave man practical birth control for the purpose of preventing runway "bacteria in a jar" conditions.. but man abused it for his own purposes "to retain their shapely form" well, only the generation that survived the flood could have made that judgment. anyone living in those days would be forced to suspend judgment.. but who are you to judge a woman who sterilizes herself?
the 66 books of the bible only mention perhaps twice, why someone did something. the first of which is the rape of Jacobs daughter, the second is Lot's daughters, both are in genesis which might be a compilation of 4 books, compiled in the 6th century bc. the rest of the bible doesn't give any reasons why anyone did anything, unlike the "apocrypha" which are full of explanations and accusations.--for this reason i am skeptical of some of the stuff in the apocrypha, but their explanations sure make a lot more sense than speculating about what really happened when Esau killed Nimrod.. allegedly.