There was clearly foul play somewhere in the line of some Books that we do have without even getting into the Books we don't.
The fortunate part is that we have the very oldest Bibles ever created, the [Codex Vaticanus and Codex Sinaiticus]. But from those 2 Versions we discover some questionable aspects to our current Version of the Bible.
One example is in the oldest 2 Bibles, the Book of Mark Chapter 16 ends at Verse 8, and our current Bibles end at Verse 20 [clearly an uninspired add on to the Word of God].
Another example is from 1 John 5:6-8:
The Codex Vaticanus and Sinaiticus do not include the Father-Son-Holy Spirit like our current Version does [clearly an uninspired add on to the Word of God]
From the Codex Vaticanus and Sinaiticus:
6 This is he that came through water and blood, Jesus Christ: not in the water only, but in the water and in the blood; and it is the Spirit that testifies, because the Spirit is the truth.
7 For they that testify are three,
8 the Spirit, and the water, and the blood, and the three are one.
Our current Bible:
6 This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth.
7 For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
8 And there are three that bear witness in earth, the Spirit, and the water, and the blood: and these three agree in one.
So it is obvious foul play has played a major role throughout the years concerning the Word of God.
It's rather obvious the perps who chose to add/remove to/from Scripture did not believe the Warning issued by God!