John Bunyan, Pilgrims Progress
Daily Light on the Daily Path (collection of Bible readings)
Gordon Fee and Douglas Stuart, How to Read the Bible for All Its Worth
Os Guinness, The Call: Finding and Fulfilling the Central Purpose of Your Life
C.S. Lewis, Mere Christianity
C.S. Lewis, Screwtape Letters
J.I. Packer, Knowing God
Roger Steer, George Muller: Delighted in God
John Stott, The Cross of Christ
John White, The Fight
Brother Yun, Heavenly Man
Ravi Zacharias, The Grand Weaver: How God Shapes Us through the Events of Our Lives
This is our introductory level of recommending reading.