You may enjoy this book on prayer edited by Matt Hancock titled Pathway to Prayer: Encouragements to Pray from Voices of the Past. I have gotten to know a little about Matt through the United Prayer online prayer group started by Steven Lee of Sermon Audio as well as through an unofficial Discord server that started out of that online prayer meeting. He has edited these notes on prayer from godly folks through the ages as an encouragement to the church to be much in prayer. The first edition is available as a free download. This link from Matt’s blog includes the free download as well as information about purchasing the published edition of the book: https://openingtheireyes.com/pathway-to-prayer-mj-hancock/