Which C.S. Lewis book collects his wartime BBC broadcasts about basic Christianity?

Mere Christianity collects C.S. Lewis’s wartime BBC broadcasts about basic Christianity. The talks were delivered between 1941 and 1944 and later revised and assembled into a book published in 1952.

The work presents a case for shared Christian beliefs rather than focusing on the distinctive doctrines of one denomination. Lewis discusses morality, belief, Christian conduct, and the person of Christ in language intended for a broad radio audience.

The book grew from three broadcast series: The Case for Christianity, Christian Behaviour, and Beyond Personality. Their original radio format helped shape Lewis’s direct, conversational style, which remains one reason the work is widely read.

Mere Christianity is not a single transcript of one speech, and its title was added for the book collection. Readers sometimes confuse it with The Problem of Pain, another apologetic work, but that earlier book concentrates on suffering and divine goodness.