This book provides a comprehensive overview of Protestant Christianity in Korea. It outlines the development of Christianity in Korea before Protestantism, considers the introduction of Protestantism in the late nineteenth century and its widening and profound impact, and goes on to discuss the situation up to the present. Throughout the book emphasises the importance of Protestantism for Korean national life, highlights the key role Protestantism has played in Korea's social, political, and cultural development, including in North Korea whose first leader Kim Il Sung was the son of devout Protestant parents, and demonstrates how Protestantism continues to be a vital force for Korean society overall.