A Call to Spiritual Reformation Priorities From Paul And His Prayers by Don Carson (Free)
From the publisher:
God doesn't demand hectic church programs and frenetic schedules; he only wants his people to know him more intimately, says top-selling author D. A. Carson. The apostle Paul found that spiritual closeness in his own fellowship with the Father. By following Paul's example, we can do the same. This book calls believers to reject superficiality and revolutionize their lives by embracing a God-guided approach to prayer.