It has been eighty years since C.S. Lewis wrote his major apologetics works. They came out during World War II. The world has changed radically since then. His arguments are still valid, but that validity might not be as obvious as it used to be.
It is not enough then for us just to parrot Lewis. We need to understand him so we can emulate him. We need to know his arguments and their strengths and weaknesses. We need to know how they can be nuanced to be more effective with today's audience. We need to learn from Lewis's methods and approach. And we need to understand his proper role as a role model:
Lewis's job is to teach us how to do our own apologetic in our own voice for our own generation.
The purpose of this book is to help him do just that.