In ’Servetus and Calvin, ’ Robert Willis meticulously explores the profound theological and philosophical conflict between Michael Servetus and John Calvin, two towering figures of the Protestant Reformation. Drawing from a rich tapestry of primary sources, Willis employs a clear, analytical style that elucidates the intricate dynamics of their correspondence and ideological clashes over issues such as the nature of God, predestination, and heresy. The narrative situates the discourse within the sociopolitical landscapes of 16th-century Europe, providing readers with a contextual understanding of how the tensions of that era influenced these pivotal figures.