The Old Testament (OT) is the first division of the Christian biblical canon, which is based primarily upon the 24 books of the Hebrew Bible, or Tanakh, a collection of ancient religious Hebrew and occasionally Aramaic writings by the Israelites. The second division of Christian Bibles is the New Testament, written in Koine Greek.
The Old Testament consists of many distinct books by various authors produced over a period of centuries. Christians traditionally divide the Old Testament into four sections: the first five books or Pentateuch (which corresponds to the Jewish Torah); the history books telling the history of the Israelites, from their conquest of Canaan to their defeat and exile in Babylon; the poetic and wisdom literature, which explore themes of human experience, morality, and divine justice; and the books of the biblical prophets, warning of the consequences of turning away from God.