What was the title of C.S. Lewis’s first series of BBC radio talks about Christianity?

C.S. Lewis’s first series of BBC radio talks about Christianity was titled Broadcast Talks.

The talks were delivered during the Second World War, beginning in 1941, when the BBC sought broadcasts that could address ordinary listeners. Lewis spoke in a direct, conversational style rather than presenting a technical theological lecture.

The first series was published in book form as Broadcast Talks in 1942. Later broadcasts were issued as Christian Behaviour in 1943 and Beyond Personality in 1944. These books were eventually revised and combined into Mere Christianity, first published in 1952.

Because Mere Christianity is the best-known title associated with the broadcasts, readers sometimes identify it as the original series title. Strictly speaking, it is the later collected form. The work explains shared Christian beliefs rather than arguing for one particular denomination.