The influential book “Mere Christianity” was written by well-known British author and Christian theologian C.S. Lewis. The book, which was published in 1952, is an anthology of Lewis’s radio addresses delivered during World War II, in which he sought to communicate the central ideas of Christianity in a way that cuts across denominational lines. Lewis deftly handles intricate theological ideas while providing a clear and understandable defence of Christian doctrine. The phrase “Mere Christianity” emphasises how Lewis tried to condense the fundamental ideas that all Christian traditions have in common. Readers from a wide range of religious backgrounds have been greatly impacted by the book, which is highly regarded for its coherence, scholarship, and ability to persuasively defend the central tenets of Christianity.