WHISPER:  Now to Hear the Voice of God
by Mark Batterson

Rees Howells Intercessor: The Story of a Life Lived For God
by Norman Grubb

Walking With God
by John Eldredge

The Practice of the Presence of God
by Brother Lawrence

The Law of Faith
by Norman Grubb

Andrew Murray on Prayer
by Andrew Murray

Touching the Invisible: Living by Unseen Realities
by Norman Grubb

Intercessory Prayer (CD's):

The Hope of Prayer: Things Can be Different (8 disc set in 2006)
by John Eldredge