"Protestantism" is a book that reveals the history and essence of the Protestantism movement, one of the main divisions of the Reformation in Europe. The author examines the origin and development of Protestant churches, as well as the influence of this movement on politics, culture and social transformations in various countries of the world. The book helps the reader better understand the key tenets of Protestantism, such as belief in the Bible as the sole source of theology, individualism in faith, and an emphasis on religious enlightenment. "Protestantism" is an important book for anyone interested in the history of religion and religious movements.