J.W.B.:
I have heard that the book of Enoch is in the Bible over in Ethiopia.
Not quite. The entire book of Enoch (except for fragments) was believed lost until 1773, when it was discovered in two Ethiopic manuscripts in Abyssinia (since then, several other copies have been discovered).
But it is not a part of any modern or ancient canon that I am aware of (the manuscripts found were not part of a larger “Bible”). To my knowledge, there has NEVER been a single collection of writings which may rightly be considered a “Bible” which included this book.
The book was known and highly regarded by many in the Early Church (as you say, it was quoted in James, and also by several of the Early Fathers).
But the book seems to have fallen out of favor by the Fifth Century (when the first formal efforts were made to define the Canon of Scripture). There is no indication that anyone in the Fifth Century thought it ought to be part of our Canon - I cannot find any record that it was even
considered.
The book was, indeed, quoted in the Epistle of James, which gave it credibility in the Early Church, but it does not demonstrate that Divine inspiration. After all, other non-Biblical works are also quoted in Scripture (for example, in 1 Corinthians 15:33, Paul quotes from
Menanderr (a Fourth Century BC poem): “Bad company ruins good morals.”
Why didn’t the Book of Enoch make the cut? Probably because it lacks Divine inspiration (just like the many other writings which were considered for inclusion but rejected).