"The Life of Luther" by Julius Koestlin is a huge contribution to the study of the life and activities of Martin Luther, an outstanding reformer of the 16th century. The book describes in detail childhood, education, religious path, struggle with the church hierarchy, as well as Luther's influence on world history. The author is a leading historian of the Reformation, who explored the symbolism and essence of Luther's teachings. Readers will be able to learn about the key events and ideas that shaped and changed the textbook figure of the Reformation, as well as the consequences of his activities for the religious life of Europe. "The Life of Luther" is not only a historical narrative, but also an inspired creative work that invites readers to deep reflection on the spiritual and historical aspects of the great movement of the Reformation.