The Bible consists of 66 books in all, unless it is a Catholic version which contain the additional and disputed* books of the “Apocrypha”.
The Old Testament is the Bible of the Jews
The New Testament consists of books written about Jesus and his teachings.
Christians believe that although the books were obviously written by people (Paul mainly, plus Matthew, Mark, Luke, John, James, Peter) there is in the coherent and agreeing message a sense that God, by the Holy Spirit, inspired the writers.
*most Christians would regard the Apocryphal writings as useful for reference but not carrying the same sense of inspiration of the other books.
Is the Bible TRUE? Jordan Peterson (YouTube)
Jordan unpacks how the Bible is the bedrock of society. The Bible itself being a library of books, all other literature in Western culture builds upon the Bible. Jordan demonstrates that the Bible isn’t just true. It is more than true! If you’re in a hurry, skip to 3 minutes in.