Experiencing Transformation Through United Worship-based Prayer
This was a great book about how to change prayer in your church from what is usually is (small attendance and prayer request based) to what it can be (worship based, focused on the Lord and hearing from him. I have met the author and think this book is better than his presentations in person. I really think that the church needs to take this seriously. The main issue is that the US church often acts as if they don't need God. The focus on prayer really submits the church to the Lord's will.
A longer review is on my blog at http://bookwi.se/two-books-on-prayer-by-daniel-henderson/