Hartmann Grisar's Martin Luther is an in-depth biography of the life and events leading up to the Protestant Reformation, focusing on Martin Luther's early life, his theological breakthroughs, and his engagement with the Catholic Church, the Humanists, and his rulers and opponents. Grisar portrays Luther's passionate and impetuous nature and examines his writings, such as 'Von dem Bapstum tzu Rome,' which present a fierce attack on the Papacy and Rome. The book also analyzes the influence of Luther's powerful rhetoric on the political and religious landscape of the time, making it an essential resource for anyone interested in the history of Christianity, the Reformation, and the life and legacy of Martin Luther. The book explores Luther's understanding of God's grace, salvation through faith, and his rejection of the sale of indulgences as a means of salvation.