Paul Pardi did a very good interview with Plantinga recently in which the philosopher talks, inter alia, about the themes of the book. Here's Pardi's introduction:
Dr. Alvin Plantinga is one of the foremost living philosophers. He has been writing and lecturing on almost all branches of philosophy for all of his long career and has had a tremendous amount of influence on how we think about metaphysics, epistemology, logic, and faith. His influence on the philosophy of religion has been so extensive that Christianity Today recently called him “the greatest philosopher of the last century” and “the most important philosopher of any stripe.”Pardi himself has an interesting story to tell which you can read here.
Dr. Plantinga taught at Calvin College in Grand Rapids Michigan and spent most of his long career at Notre Dame University. His most important work has been the Warrant series culminating with Warranted Christian Belief in which he argues that a person can be fully justified in believing in God’s existence even if that belief is not grounded on evidence as it’s typically understood.