C.S. Lewis has always been a talented writer. His “Chronicles of Narnia” was one of the first book series I read. His non-fiction literature stands as some of the best Christian material written in the last century. All of that said “Mere Christianity” is probably one of his best books.
The purpose of the book is to introduce non-Christians into the most basic and fundamentals of Christian thought; what C.S. Lewis calls “Mere Christianity”, but the information given is as useful to Christians as non-Christians. It thoroughly and succinctly makes the case for natural law, the existence of God, Christian morality, and the “core” set of beliefs that make Christianity. Almost like a Christian version of “Book of Five Rings.” A book with significantly more wisdom than you would expect in its modest 228 pages.