Reddit mentions of Complete Books of Enoch: 1 Enoch (First Book of Enoch), 2 Enoch (Secrets of Enoch), 3 Enoch (Hebrew Book of Enoch)

There were probably theological reasons it was excluded in later canon lists, even though Jude and 1 Peter make reference to it. Enochic writings developed a worldview in which fallen angels were the cause of the fallen state of man, whereas Christian apocryphal writings in the first century and later focused on the Adam and Eve story as the cause instead.

That said, it's a fascinating book and has some affinities with Daniel (having been written around the same time) as well as other deuterocanonical books like Jubilees and 2 Baruch.

It's easy to find copies online, but there's actually a new translation out I want to buy that includes 2 and 3 Enoch. Most free copies online will probably be translations of the Ethiopic version, whereas the new print translations are done from the Hebrew Dead Sea Scrolls.

Trivia: There's a related book called the Book of Giants, preserved by the Manichaeans and the Qumran sect, which tells the Enoch story from the point of view of the giants. One of them is named Gilgamesh!

Try this for information: https://smile.amazon.com/Complete-Books-Enoch-Secrets-Hebrew/dp/1453890297/ref=sr_1_8?ie=UTF8&qid=1518535711&sr=8-8&keywords=books+of+enoch