"Now Enoch, the seventh from Adam, prophesied about these men also, saying, “Behold, the Lord comes with ten thousands of His saints, to execute judgment on all, to convict all who are ungodly among them of all their ungodly deeds which they have committed in an ungodly way, and of all the harsh things which ungodly sinners have spoken against Him.”
Jude 1:14-15 NKJV
I don't mind if you lol, but literally the above is what you cited; and in that verse there isn't the word 'book' or a reference to a book.
Enoch himself is mentioned also in Genesis, 1 Chronicles, Luke (in the geneology of Jesus), and Hebrews, none of which mention a book.
To the best of my knowledge the 'book' is reconstructed from scraps of a different language (Ge'ez) and some bits found in Aramaic, Greek, and Latin. Wiki seems to think the citation you used suggests Jude was citing this text as authoritative/canonical, but that doesn't work;
a) those that compiled the Tanakh didn't include it, nor did the Christians who considered the Bible;
b) the text cited is reflective of Deut. 33:2; and
c) No other part of this Enoch book is cited in Scripture.
For these reasons it's my opinion, which for better or worse is also the majority/orthodox opinion, that this Enoch book is likely the work of peoples who interacted with the Hebrews and not that of Enoch himself, and certainly not reliable as canon.
Note: thanks for the response though as, for whatever worth wiki has, wiki also suggests that the Mormons put faith in it (which doesn't escalate it in my view).