A decent devotional commentary to get a reader into the Psalms. Each chapter provided a brief introduction and overview, followed by a walk-through of the psalm, and concluding with a brief application section. I appreciated the attention given to the literary structure of each psalm, as well as the places where Betts pointed out the possible historical backdrop for each psalm.
The treatment of each psalm was, in my opinion, too lengthy to be a devotional, but too brief to be a commentary. Some psalms were treated together. Sometimes this made sense (e.g. Psalm 9-10, 42-43), but other times it felt forced. The book would have been more useful had it actually covered the entire psalter and not arbitrarily ended in psalm 50.