Mere Christianity

In 'Mere Christianity', C.S.

Lewis argues for the existence of God and defends Christian theology.

The book is divided into four parts: the first argues for the existence of God based on the 'law of human nature'; the second defends Christian theology, including the 'Liar, lunatic, or Lord' trilemma regarding Jesus Christ; the third explores Christian ethics, including the cardinal and theological virtues; and the fourth discusses the Christian conception of God, particularly the Holy Trinity.

Lewis also addresses topics such as free will, morality, sexual ethics, and the institution of marriage.

The book is known for its clear and logical presentation of Christian apologetics and has been praised for its straightforward and humorous writing style.