Most of the following books can be purchased at Amazon.com or Christianbooks.com
Becoming a Prayer Warrior: A Guide to Effective and Powerful Prayer by Elizabeth Alves
E.M. Bounds books on prayer:
Power Through Prayer
Prayer and Praying Men
The Essentials of Prayer
The Necessity of Prayer
The Possibilities of Prayer
Purpose in Prayer
The Weapon of Prayer
Mighty Prevailing Prayer by Wesley Duewel
Rees Howells Intercessor: The Story of a Life Lived for God by Norman Grubb
With Christ in the School of Prayer by Andrew Murray
Shaping History Through Prayer and Fasting by Derek Prince
Revival Praying by Leonard Ravenhill
Healing Care, Healing Prayer: Helping the Broken Find Wholeness in Christ by Terry Wardle
Becoming a Prayer Warrior: A Guide to Effective and Powerful Prayer by Elizabeth Alves
E.M. Bounds books on prayer:
Power Through Prayer
Prayer and Praying Men
The Essentials of Prayer
The Necessity of Prayer
The Possibilities of Prayer
Purpose in Prayer
The Weapon of Prayer
Mighty Prevailing Prayer by Wesley Duewel
Rees Howells Intercessor: The Story of a Life Lived for God by Norman Grubb
With Christ in the School of Prayer by Andrew Murray
Shaping History Through Prayer and Fasting by Derek Prince
Revival Praying by Leonard Ravenhill
Healing Care, Healing Prayer: Helping the Broken Find Wholeness in Christ by Terry Wardle