There are many Protestants and Catholics who have been deeply affected and spiritually changed by the writings of C.S. Lewis. There are many converts to Catholicism, some very well known, who credit C.S. Lewis for playing a significant role in their conversion. This includes famous converts and writers like Peter Kreeft, Sheldon Vanauken, Thomas Howard, and Joseph Pearce. But the ironic and perplexing fact is that Lewis himself, while "Catholic" in many aspects of his faith and devotion, never became a Roman Catholic. Many have wondered why. Joseph Pearce, highly regarded literary biographer and great admirer of Lewis, is the ideal writer to try to answer that question. The relationship of Lewis to the Roman Catholic Church is an important and intriguing topic of interest to both Catholics and Protestants. Pearce delves into all the issues, questions, and factors regarding this puzzling question. He gives a broad and detailed analysis of the historical, biographical, theological, and literary pieces of this puzzle. His findings set forth the objective shape of Lewis's theological and spiritual works in their relation to the Catholic Church. This well-written book brings new insights into a great Christian writer, and it should spark lively discussion among Lewis readers and bring about a better understanding of the spiritual beliefs of C.S. Lewis.