Incredible as it may seem the Bible was written over a period of around 1500 years by more than 40 different authors from many different back grounds and walks of life. The first books of the Bible, in the Old Testament, were written by Moses who was a Hebrew, though raised in Pharohs household as an Egyptian who later in life was a political leader and judge. Later David - a shepherd, warrior, king, poet and musician contributed greatly to the content of the Old Testament portion of the Bible.
Other contributors included: Joshua a military general, Daniel a prime minister, Solomon a philosopher king, Luke a physician and historian, Peter a fisherman, Matthew a tax collector, Paul a rabbi (Jewish religious leader)... These writers wrote in different places including but not restricted to: the wilderness, prison, palaces, on the road travelling... on different continents: Asia, Africa and Europe and consequently it was written in different languages: Hebrew which was the language used by the Israelites and for most of the Old Testament, Aramaic which is very close linguistically to Hebrew and was the "common language" of the Near East until around the 4th century B.C. Much like English is the common language for many now for communicating cross culturally. The New Testament was mostly written in Greek and was the "common language" at the time of Christ.
As you read the Bible you will notice that it addresses many controversial subjects with an amazing harmony. Topics that today produce fiercely opposing views. Topics such as marriage and divorce, remarriage, homosexuality, adultery, fornication (sex outside of marriage), lying, parenting, the nature of God....
The Bible though, in spite of it's diversity, unfolds one key story: God's redemption of the human race. The theme that unifies all of scripture is salvation from sin and judgement to one of complete transformation. A release from sin and it's consequences into a real relationship with a merciful, loving and holy God.
These unique aspects of the Bible do not prove it is true or inspired but it does challenge us to consider its claims. If we are truly sincere in seeking truth we will give the Bible serious consideration because it is so unique it terms of its continuity.