How do Psalms, Proverbs, and Job differ as poetic books of the Hebrew Bible?

In the Hebrew Bible, the books of Psalms, Proverbs, and Job are all categorized within the Ketuvim (Writings) and utilize parallelism as a fundamental poetic structure. However, they differ significantly in purpose, tone, and content:123

• Psalms: This is a collection of sacred songs and poems intended for liturgical use. It encompasses a wide range of human emotion and faith, from joyous celebration and hymns to bitter protest and laments. Unlike the wisdom books, its primary focus is on the relationship between the community or individual and God within the context of worship.1
• Proverbs: This book represents the tradition of practical wisdom. It consists largely of mashal (aphoristic sayings) designed to provide prudential guidelines for a successful, ethical, and well-ordered life. It is generally optimistic, assuming that wisdom is attainable through human reason and discipline, and it focuses on the universal patterns of human nature rather than historical events.4
• Job: This work is a masterpiece of speculative wisdom that challenges the rationalistic ethics found in books like Proverbs. Through a blend of prose narrative and poetic dialogue, it explores the profound agony of innocent suffering and the mystery of God’s justice. Rather than offering simple maxims, it depicts a man’s intense struggle to find meaning in a seemingly indifferent universe, ultimately leading to a personal encounter with the divine.45