Ravi Zacharias has written an outstanding apologetic defending The Christian Faith; some suggest the best since C.S. Lewis.
This book was written in 1994 was the result of encouragement by Charles Colson after he heard the tape recorded at Harvard named the Veritas Series</
This is an outstanding polemical work. It has four major parts:
I. Antitheism Is Alive–and Deadly
II. What Gives Life Meaning?
III. Who is Jesus[and Why Does I Matter?]?
Appendix A Questions and Answers on Atheism and Theism [From Harvard University meeting]
Appendix B Mentors to the Skeptics [Excellent short biographies showing their contributions]
Rene Descartes [1596-1650]
David Hume [1711-1776]
Immanuel Kant [1724-1804]
Soren Kierkegaard [1813-1855]
Friedrich W. Nietzehe [1844-1900]
Bertrand Russell [1872-1970]
Jean Paul Sartre [1905-1980]
This 218 page book published in 1994 would be a great book to use in college or private discussions with Skeptics.