Too many different interpretations for it to be a book of truth...who's truth should it be today then?
Do you mean copy-writes or people just understanding some verses differently. The RCC Bible of 325AD and the KJV1611 Edition should be the same texts exactly, both were from the Original Greek and the original Hebrew.
Is it a good writer that can have so many people coming to different conclusions or a bad one. A bad one should have all people agreeing on what the wrong points are.
Understanding verses and passages is not something that offers a wide choice in understanding. If you take small portions and examine then and apply those 'rules suggested' then the many variations become a very few variations. The verse below sets 3 thing into a sequence, all other passages agree with sequence. That also means 30M pre-tribbers are believing in a false doctrine. No doubt you have something that you would consider to be a better example, so do I, two in fact that set the stage for all prophecies not yet fulfilled. Course there is one stipulation, you have to assume God would write it in a form that is easy to understand. There is nothing complicated about the verse below, by the time you read it you already have perfect understanding. Getting all the passages that reference any of those 3 steps does take some reading, even if you get on a wrong passage that 'mistaken one' does apply to something else in the sequence so it isn't wasted time.
2Th:2:1:
Now we beseech you,
brethren,
by the coming of our Lord Jesus Christ,
and by
our gathering together unto him,
2Th:2:2:
That ye be not soon shaken in mind,
or be troubled,
neither by spirit,
nor by word,
nor by letter as from us,
as that the day of Christ is at hand.
2Th:2:3:
Let no man deceive you by any means:
for that day shall not come,
except
there come a falling away first,
and that
man of sin be revealed,
the son of perdition;
2Th:2:4:
Who opposeth and exalteth himself above all that is called God,
or that is worshipped;
so that he as God sitteth in the temple of God,
shewing himself that he is God.
The hardest part of the above is deciding if promoting a false doctrine can qualify as 'falling away' from what the true doctrine is, believers are on earth for the whole thing, our gathering is in order that agrees with this above doctrine.
1Co:15:23:
But every man in his own order:
Christ the firstfruits;
afterward they that are Christ's at his coming.
Add in a few more references and you end up with something not many church leaders would ever agree with, that doesn't make it wrong, it makes all of them wrong unfortunately.