I Will Pray With Spirit and Understanding
by John Bunyan
The Saints The Saints' Privilege And Profit Or
The Throne Of Grace
by John Bunyan
The 100 Year Prayer Meeting
John Gill on Prayer
B.B. Warfield
Supplying resource material for praying believers and their leaders on:
Prayer and The Prayer Meeting
Other Subjects:  The Attributes of God, The Death of Christ.
John Bunyan on Prayer

A congregation without a prayer meeting is essentially defective in its organization,
and so must be limited in its efficiency.
The Prayer Meeting and Its History, J. B. Johnston