This is a list from RZIM ministries. What a way to spend the Summer!
Introductory Recommended Reading
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
Further Reading in Apologetics
Norman Geisler, Christian Apologetics
Alister McGrath, The Twilight of Atheism: The Rise and Fall of Disbelief in the Modern World
Esther Lightcap Meek, Longing to Know: The Philosophy of Knowledge for Ordinary People
Amy Orr-Ewing, Is the Bible Intolerant?
Francis Schaeffer, A Francis Schaeffer Trilogy: The God Who Is There, Escape from Reason, He Is There and He Is Not Silent
James W. Sire, Naming the Elephant: Worldview As a Concept
N.T. Wright, Simply Christian: Why Christianity Makes Sense
Ravi Zacharias, Can Man Live Without God?
Ravi Zacharias, ed., Beyond Opinion: Living the Faith We Defend