""What Desirable Results Will Definite And Determined Prayer Produce?"" is a book written by R. A. Torrey that explores the power of prayer and its effects on one's life. Torrey argues that prayer is not just a religious ritual, but a powerful tool that can bring about real change in one's life. He emphasizes the importance of having a clear and specific goal in mind when praying, as well as having complete faith and determination in the power of...