Does the book of Psalms have a deliberate shape, or is it mostly random?

Steffen Jenkins is half German, half Welsh, was born in Spain but again in England. He has served in seminaries in Cuba as a lecturer, and as a pastor in an evangelical Presbyterian church. He greatly enjoyed a partnership with Tyndale House, Cambridge, to train up self-replicating Cuban lecturers in Greek and Hebrew. His doctoral research under Prof Gordon Wenham focused on prayers for vengeance in the Psalms, and is available as Imprecations in the Psalms: Love for Enemies in Hard Places. His twin passions of equipping pastors with languages to a high enough standard that they can use them, and of helping pastors to love the Old Testament shamelessly, are happily combined by his idiosyncratic position as lecturer of Greek and OT at Union School of Theology. He is writing a Greek textbook and a beginner’s guide to the Inspiration of Scripture. Here, Steffen answers questions from the talk "Self-Introduction of the Psalms: How David Introduces Us to Ourselves, Himself, and His Greater Son", given at the 2024 European Leadership Forum.