The 66 Books are those written by God known as the Bible. This series of studies, reads the text and gives the sense. All we want to know is what God intended us to know.
There are 66 serious issues to deal with here and we are interested to know what they are, and how we can understand them. We have a key that unlocks the door of knowledge and that comes from one of the 66 books called Isaiah’s prophecy. It is the one that gives us proof of all the others. There are 66 chapters in Isaiah, one for each of the books of the bible. The middle verse of the Isaiah chapter is the subject of the book, and all verses say something about the book to which it refers.
You can accept this or not. It is my job to prove it to you. God not only wrote it, but he proves he wrote it, by telling us about the subject of the book before it was written. That is called prophecy, and we know God is the only one who can do that.