The body of OT books that reflect deeply on the nature of wisdom, the fear of the LORD, the problem of suffering, and the practical art of righteous living. The core wisdom books: Proverbs (practical wisdom in short sayings), Job (wisdom wrestling with undeserved suffering), Ecclesiastes (wisdom reckoning with vanity and death), and Song of Songs (wisdom about covenant love and marriage). Several Psalms are classified as wisdom Psalms (especially Psalms 1, 37, 49, 73, 112, 119, 128). In the NT the epistle of James is often called "the Proverbs of the New Testament" for its wisdom-literature style.
Wisdom literature has a distinct theological voice that complements the Law and the Prophets. Four features. (1) Fear of the LORD as foundation. "The fear of the LORD is the beginning of knowledge" (Proverbs 1:7) and "the fear of the LORD is the beginning of wisdom" (Proverbs 9:10) — wisdom is not a neutral skill but a covenantal posture. Reverent submission to Yahweh is the entry point; without it, human "wisdom" is folly. (2) Observation of creation order. Proverbs observes how the world actually works — lazy hands produce poverty, sexual immorality destroys, truthful speech builds — not as mechanical laws but as general patterns within God's ordered creation. (3) Limits acknowledged. Job and Ecclesiastes are deliberate counterweights to a simplistic reading of Proverbs. Yes, generally the wicked suffer and the righteous prosper — but not always this side of glory. Job: sometimes the righteous suffer greatly. Ecclesiastes: sometimes life appears "vanity of vanities" — and the answer is not to deny that appearance but to fear God and keep His commandments (Eccl 12:13). (4) Christ as Wisdom. 1 Corinthians 1:24-30 identifies Christ Himself as "the wisdom of God" and "wisdom from God." Proverbs 8's personified Wisdom reaches its ultimate referent in the Son. Every Christian who wants to grow in practical godliness should saturate himself in the wisdom books.