Lamentations of Jeremiah, chapters 4 & 5.  

Suggestions for next study topics: Tim Keller, Prayer: Experiencing Awe and Intimacy with God; D.A. Carson, Praying with Paul: A Call to Spiritual Restoration, Donald S. Whitney, Praying the Bible and John Piper, Reading the Bible Supernaturally, John Bunyan, The Pilgrim’s Progress; Thomas R. Kelly, A
Testament of Devotion ( Please read the synopsis in 25 Books Every Christian Should Read, pp.297-302); and Rod Dreher, The BenedictOption, about which is written in The New Yorker, May 1st under The Seeker.