Get a _free_ copy of Walter Brueggeman's _Praying the Psalms_, Second Edition.
It seems like there are a lot of books out nowadays on praying the Psalms. Most of the time I pass them up, even if they are free, because the quality of writing and/or scholarship is just "not there." Brueggeman, however, certainly has a very large number of books, as well as other publications, on his _curriculum vitae_, and is considered a Biblical scholar in the first tier.
This is a Wipf and Stock book (another indication of high quality). To get the ebook, follow the same instructions as I gave in post #542. If you have any issues ordering, and/or getting the book for free, let me know.
https://wipfandstock.com/praying-the...eid=bf47d6143e.