The study Why: 40 Days Pursuing Answers To Life’s Biggest Questions recommends the following books for answering the question, “Why Am I Here?”
To Everyone An Answer: The Case for the Christian Worldview, by Frances Beckwith, William Lane Craig, & J.P. Moreland
Letters From a Skeptic, by Gregory A. Boyd
I’m Glad You Asked, by Ken Boa and Larry Moody
That’s Just Your Interpretation, by Paul Copan
Reasonable Faith, by William Lane Craig
Why I Am A Christian, by Norman Geisler and Paul Hoffman
Give Me An Answer, by Cliffe Knechtle
Pocket Handbook Of Christian Apologetics, by Peter Kreeft and Ronald Tacelli
Know Why You Believe, by Paul Little
How To Give Away Your Faith, by Paul Little
Scaling The Secular City, by J.P. Moreland
The Case For Faith, by Lee Strobel
The Purpose Driven Life, by Rick Warren