A number of years ago, I took a series of evening classes on the Psalms from Rabbi Feld, at the Jewish Theological Seminary in New York. At that time, he said he was writing a book on the Psalms, and apparently that book finally came out. He analyzes 15 psalms, under the rubric of (as the title says) joy, despair, and hope. His writing style is wordier than I like, but he has interesting takes on the poems he analyzes, & I enjoyed the book.