Jim Hamilton argues that the Book of Psalms is not a random anthology, but a carefully arranged, unified book that tells a coherent, biblical-theological story from David to the Messiah and the salvation of the world. Like the narrative paintings of the Sistine Chapel, the Psalter has been intentionally shaped—originating with David, expanded by those who understood his vision, and finalized in a canonical form that reflects one storyline.

Hamilton maintains that the superscriptions are original and reliable, noting that Chronicles treats them as authentic. Books 1–2 focus overwhelmingly on David’s life and kingship. Book 3 reflects the crisis of the monarchy and the devastation of exile, climaxing in Psalm 89’s lament that seems to question God’s promise to David. Book 4 begins with Moses (Psalm 90), intentionally recalling earlier intercession and anchoring hope in God’s character and covenant faithfulness. Book 5 moves toward restoration, climaxing in Psalm 110’s messianic king-priest, followed by hallelujah psalms and the king’s triumphant arrival (Psalm 118), the law shaping God’s people (Psalm 119), and the nations streaming to Zion (Psalms 120–134).

The Psalter ultimately anticipates the Messiah’s victory, the gathering of God’s people, and the praise of all creation (Psalms 146–150). Hamilton concludes that reading the Psalms as a unified book deepens our understanding of Scripture, shapes our worldview, and forms Christlike worshippers.