The books of the Old Testament were written from approximately 1400 B.C. to 400 B.C. The books of the New Testament were written from approximately A.D. 40 to A.D. 90. So, anywhere between 3400 to 1900 years have passed since a book of the Bible was written. In this time, the original manuscripts have been lost. They very likely no longer exist. Also during this time, the books of the Bible have been copied again and again. Copies.