Good poetry is like a good painting: the more you linger over it, the more it reveals. It is a deep well that never runs dry. And that is why the Psalter, like a good painting, keeps giving. In the last four decades, Psalms scholarship has found remarkable fruitfulness in reading the Psalter as a book–that is, in reading the Psalms as a unified composition with a metanarrative across its 150 poems. Pivotal questions associated with this approach really boil down to two questions–how and why? How...