How Do We Know That Books Were Not Lost from the Bible?

However even if there were one, or even dozens, of books that were excluded from the bible, it simply does not matter, because what we do have in the 66 books of the bible is enough for us to thoroughly understand God’s redemption plan,

The processes that produced our modern Bible are very complex. The original inspired writers recorded, or had recorded by their scribe, the original writing called autographs. From those original autographs many copies, called manuscripts, were painstakingly produced. Some of the manuscripts were moved all over the region and are continuing to be found in modern times. (see Dead Sea Scrolls)

When You Hold a King James or American Standard Bible You Can Be Sure That You Have the Word of God
Because these writings have been found over the years in many parts of the world they provide the opportunity to check and cross-check the validity and accuracy of the documents on which the Bible is based. There are presently 5,686 Greek manuscripts in existence today for the New Testament. If we compare the number of New Testament manuscripts to other ancient writings, we find that the New Testament manuscripts far outweigh the others in quantity. If Bible critics want to disregard the New Testament, then they must also disregard other ancient writings by Plato, Aristotle, and Homer. When you hold a King James or American Standard Bible you can be sure that you have the Word of God.

There Are Many Books That Claim Inspiration and Boast A Right to be Included in the Canon of Scripture,
But whether or not other inspired documents have been lost to history and therefore excluded from the Bible, there is no way to definitively know. There are many books that claim inspiration and boast a right to be included in the canon of Scripture, but most of them have been proven to be mostly uninspired, such as the Forgotten Books of Eden and Lost Books of the Bible. However, even if there was one or even dozens of books that were excluded from the Bible, it simply does not matter. Because what we do have in the 66 books of the Bible is enough for us to thoroughly understand God’s redemption plan, the sacrifice of Jesus Christ and even affords us a view into futuristic events to come. The reality is the almost every human being on the planet today has not availed themselves of the strong knowledge of what has been included within the pages of the Bible. So if there were other inspired writings, they would still be virtually ignored by most.