William Edgar (DTheol, University of Geneva) is professor of apologetics and coordinator of the apologetics department at Westminster Theological Seminary. His books include Reasons of the Heart, The Face of Truth, and Truth in All Its Glory.
I had to read this book for my Christian Worldview class at college. It mostly dealt with topics that keep people from coming to Christ such as doubt, Science vs. Creation, the existence of evil in the world, etc. I wasn't fond of how it was written. Overall, it was just ok. This wasn't a book I would have finished on my own. Not to mention the 3 page reflection paper I had to write over my reading every single Thursday.
Excellent book for that person who is unsure about the truth. It does not cover everything, but what it does cover is excellent as it approaches each and every point from the perspective of an unbeliever.
If you find Van Til irrelevant or dry, and cant imagine presuppositionalism done in a humane way, this book (which is not on apologetics but actually does apologetics) will change your mind. An exemplar for apologetics informed by Van Til and shaped by Schaeffer.