As an expression of his dedication to Islam, Mehmed actively sought to establish his reputation as a convert-maker, convincing or compelling Christian and Jewish subjects to be "honored by the glory of Islam" and Muslims subjects to turn to Islamic piety. Revising the conventional portrayal of a ruler so distracted by his passion for hunting that he neglected affairs of state, Baer shows that Mehmed IV saw conversion as central to his role as sultan. He traces an ever-widening range of enforced piety, conversion, and conquest expanding outward from the heart of Mehmed IV's empire.

This account is the first to correlate the conversion of people and space in the mature Ottoman Empire, to investigate conversion from the perspective of changing Ottoman ideology, and to depict the sultan as an interventionist convert-maker. The resulting insights promise to rework our understandings of the reign of a forgotten ruler, a largely neglected period in Ottoman history, the changing nature of Islam and its history in Europe, relations between Muslims, Christians, and Jews in Europe, the practice of jihad, and religious architecture in urban history.