During the Counter-Reformation, inquisition manual authors working in Italian lands adapted the Catholic Church's traditional tactics of inquisitorial procedure, which had been formulated in the medieval period, to the prosecution of philo-Protestants. Through a comparison of the texts of four such authors to contemporary inquisition processes, Jane K. Wickersham situates the Roman inquisition's prosecution of philo-Protestants within the larger framework of the complex religious upheavals of the sixteenth century. Identifying the critical role played by ritual practice in discovering and prosecuting heretical subjects, Wickersham uncovers two core reasons for its first, as a practical means of prosecuting a variety of philo-Protestant beliefs, and second, as an approach firmly grounded within the Catholic Church's history of prosecuting heresy. Finally, Rituals of Prosecution provides an in-depth examination of the inquisitorial processes of urban residents from humble socio-economic backgrounds, providing new insight into how the prosecution of ordinary people was conducted in the early modern era.