The books can probably be categorized in a number of ways. One classification that will give four types, is:Torah (law) (Genesis, Exodus, Leviticus, Numbers, Deuteronomy)History books (Joshua, Judges, Samuel, Kings)Prophets (Isaiah, Jeremiah, Ezekiel, Hosea, Joel, etc.)Writings (Psalms, Proverbs, Job, Song of Songs, Ruth, Lamentations, Ecclesiastes, Esther, Daniel, Ezra & Nehemiah, Chronicles)