Professor, apologist, novelist, literary critic, fantasy writer, philosopher, theologian, and ethicist, Lewis has exerted a profound influence on the way millions of people read literature, make moral choices, think about God, and live out the Christian faith. By means of a genial blend of reason and imagination, logic and fantasy, profound academic insight and good old common sense, Lewis has challenged the modern world to re-examine the claims of Christ, the Bible, and the Church, re-experience the goodness, truth, and beauty of literature, and re-expand its vision of God, man, and the universe. In each 600-word entry, Markos enlist Lewis’s aid in the study, both theoretically and practically, of a topic of perennial interest to humanity and of particular interest to the early 21st century.