I would run a million miles from the so called "book of Enoch. It is another source quoted to justify the error that “the sons of God” were fallen angels. However, it is important for any reader to know that the Enoch that is mentioned in Genesis 5 did, not write this Book of Enoch. The book does not contain the words of the ancient biblical patriarch Enoch, since he would have lived several thousand years earlier than the first known appearance of the so-called “book of Enoch.
This book of Enoch is a “pseudepigraphic” book, which means in Greek “falsely superscripted”. It is a collection of writings from different authors who wished to hide their true identities behind well-known names from the past. It is from a small part of this book and from one author, that the brother of James, quoted in his letter in Jude 1:14-15 “And Enoch also, the seventh from Adam, prophesied of these, saying, Behold, the Lord cometh with ten thousands of his saints, To execute judgment upon all, and to convince all that are ungodly among them of all their ungodly deeds which they have ungodly committed, and of all their hard speeches which ungodly sinners have spoken against him.” Unfortunately certain early Christian authors such as, Clement of Alexandria, and Irenaeus expounded “The Book of Enoch” as being true and on a level with scripture. This resulted in others jumping to this erroneous conclusion.
They argue that because Jude quoted from “The Book of Enoch”, therefore all that is contained in the book must be trustworthy. However, it has never been accepted as “inspired Scripture” by most scholars or preachers, especially as it is made up of a collection of works. It is very possible that Jude accepted one small part of the book or one of the many authors, but to say that he accepted them all is not wise. Even though Jude quoted from this book, we have no reason to believe he elevated it to the same level as Holy Scripture. The insertion of the quotation simply acts as a further emphasis to Jude’s main message that God will judge the ungodly and though he discusses fallen angels, nowhere does he mention angels marrying humans.
Some scholars erroneously believe that Jesus got some of His revelation from the book, however, Scripture says that He received all of his revelation directly from God, In John 8:28 “Then said Jesus unto them, when ye have lifted up the Son of man, then shall ye know that I am he, and that I do nothing of myself; but as my Father hath taught me, I speak these things”. And again in John 12:49-50 “For I have not spoken of myself; but the Father which sent me, he gave me a commandment, what I should say, and what I should speak. And I know that his commandment is life everlasting: whatsoever I speak therefore, even as the Father said unto me, so I speak”. And again in John 14:11 “Believe me that I am in the Father, and the Father in me: or else believe me for the very works' sake”. John 15:15 “No longer do I call you servants; for the servant knoweth not what his lord doeth: but I have called you friends; for all things that I heard from my Father, I have made known unto you.”
It is argued that other works like “The Genesis Apocryphon” which quotes from the Dead Sea Scrolls, mentioning angels interbreeding with human women and “The Book of Jubilees”, which also argues that the “sons of God” were also fallen angels, must prove the argument and that most people in the time of the apostles believed that the “sons of God” were fallen angels. However, just because two ancient books exist, it does not make them scripturally accurate, nor do they prove the thoughts of true men of God at that time. There are plenty of books today that claim to prove thousands of theories but does that make them right? We need to look at the only Book to hold the truth and that is the Bible.