The Old Testament and the New Testament are the two primary books that make up the Holy Bible, which is considered a sacred literature in Christianity. The Old Testament, which is shared by Judaism, describes God's commandments and predictions as well as the history of Israel and the creation of the world. 

The life, teachings, death, and resurrection of Jesus Christ, as well as the growth of the early Christian church, are the main subjects of the New Testament. The Bible, which was penned by several authors over many years, is a source of faith, morality, and spiritual development. 

Poetry, wisdom writings, historical accounts, prophecies, and epistles are all included. The Bible, which has been translated into many languages and is still read by billions of believers worldwide, is the best selling book of all time and has had a significant impact on Western philosophy, law, art, and culture.