Luther, vol. 1 of 6 by Hartmann Grisar is a historical account written in the early 20th century. This volume serves as the introductory part of a comprehensive biography, focused on the life and influence of Martin Luther, a key figure in the Protestant Reformation. The book delves into Luther's early years, educational background, and the spiritual and psychological motivations behind his eventual vow to become a monk. The opening of this work recounts the pivotal moment when the young Luther, a student at the University of Erfurt, decides to join the Augustinian Order following a life-threatening thunderstorm. As he enters the monastic life, Grisar sets the stage by exploring Luther's upbringing, education, and the various pressures he faced, including his father's disapproval of his religious calling. This introduction not only highlights Luther's inner turmoil and determination but also hints at the character's complexity and the significant role his early experiences played in shaping his theological beliefs and future actions.