I don't see why you think the Bible is any different from other ancient books. I'm sure it has a lot to teach us, but so do other books. I grew up in a religious family and was taught to believe the Bible came from God, but I don't hold to that anymore.
You’ve hinted at one reason those of us who are Christians believe the Bible is different from every other book that’s ever been written: We believe God gave it to us, and therefore it is God’s Word. As the Apostle Paul wrote, “All Scripture is given by inspiration of God” (2 Timothy 3:16, NKJV).
I realize this isn’t what you believe, but let me give you three reasons why the Bible is unique, and why I hope you’ll take it seriously. First, the Bible is unique because it, and it alone, leads us to Jesus Christ. Why is this important? Because Jesus was more than just another great religious teacher or philosopher; He was God in human flesh. He demonstrated it by His life — and He proved it by His resurrection from the dead.
Second, the Bible is unique because it tells us how God wants us to live. Why are we here, and how are we supposed to live? The Bible tells us — and your life will never be the same once you understand this.
Finally, the Bible is unique because it gives us hope for the future. This world is not all there is to life; when we know Christ, ahead of us is heaven! Don’t turn your back on God, and don’t reject the salvation He offers you any longer. Instead, discover the Bible for yourself, and through its pages discover the new life Christ offers you — now and forever.