Bulus ibn Raja? (ca. 955-ca. 1020) was a celebrated writer of Coptic Christianity from Fatimid Egypt. Born to an influential Muslim family in Cairo, Ibn Raja? later converted to Christianity and composed The Truthful Exposer (Kitab al-Wadih bi-l-Haqq) outlining his skepticism regarding Islam. His ideas circulated across the Middle East and the Mediterranean in the medieval period, shaping the Christian understanding of the Qur?an's origins, Muhammad's life, the practice of Islamic law, and Muslim political history. This book includes a study of Ibn Raja?'s life, along with an Arabic edition and English translation of The Truthful Exposer.