Book on Prayer

I have read through the book Draw the Circle: The 40 Day Prayer Challenge by Mark Batterson for this season of Lent and found it very inspiring.  I have always enjoyed being renewed in my life of prayer.

The author ends the book by saying "Prayer is the difference between appointments and divine appointments.  Prayer is the difference between good ideas and God-ideas.  Prayer is the difference between the favor of God and the luck of the draw.  Prayer is the difference between closed doors and open doors.  Prayer is the difference between possible and impossible.  Prayer is the difference between the best we can do and the best God can do."    

I firmly believe as well that the discipline of prayer is essential for the person of faith.  God has given us the privilege to enter into conversation.  We can draw near to God with our deepest concerns.  Of course, there are the many promises in find in Scripture in regard to prayer.  We have every reason to pray!

Here is a book that is beneficial to read to help give you more confidence in your praying.  Have you even read much on prayer to help you along in this discipline?