This volume offers biblical-theological and exegetical investigations into the doctrine of divine immutability through engagement with key Old Testament passages and corpora. While the Old Testament consistently affirms God's constancy, it also portrays God as dynamically engaged with his people in ways that have long prompted theological reflection. The studies collected here explore how these themes cohere within the unfolding narrative of Scripture, demonstrating that divine immutability is expressed not as static immobility but through God's unchanging character, purposes, and covenant faithfulness in the midst of history. By grounding the discussion in detailed exegesis, the volume contributes to contemporary conversations on divine attributes, Old Testament theology, and the relationship between biblical studies and systematic theology.