"The intelligent child of God must be driven to say, 'I must pray, pray, pray. I must put all my energy and all my heart into prayer. Whatever else I do, I must pray.'" Stunning and forthright, R.A. Torrey's "little book on prayer" is a reflection of the writer who once had it said about him, "One wonders if there has ever lived a man who did so many things well for Christ." Torrey deals with the key elements of life-changing prayer, such as praying...