Old Testament as a preparation for the New Covenant and New Testament.

Old Testament - Wikipedia, the free encyclopedia: "The books can be broadly divided into the Pentateuch, which tells how God selected Israel to be his chosen people; 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" books dealing, in various forms, with questions of good and evil in the world; and the books of the biblical prophets, warning of the consequences of turning away from God."