"Psalms 1" provides the reader with a commentary on the first 72 psalms. Each commentary contains the psalm followed by explanations of its origins, uses in the temple, the traditions and periods from which it sprang and its comparison to other psalms and Scripture passages. The verses are grouped by function, such as lament, confidence in God and deliverance.
I was somewhat disappointed by this book. While I did pick up some insights into how the Psalms developed over time and their use in Temple worship, I really do not feel that I am more familiar with the Psalms than I was before reading it. It is an intellectual study, not an inspirational work. I think that one seeking an understanding of the Psalter can find better aids.