3 groups of books in the old testament
Christians traditionally divide the Old Testament into four sections: (1) the first five books or Pentateuch (Torah); (2) the history books telling the history of the Israelites, from their conquest of Canaan to their defeat and exile in Babylon; (3) the poetic and "Wisdom books" dealing, in various forms, with questions of good and evil in the world; and (4) the books of the biblical prophets, warning of the consequences of turning away from God.