Jeffrey Lang is an American mathematician, university professor, and Muslim author known for his writings on Islam, the Qur’an, faith, spirituality, and the intellectual journey of Muslims. A former Catholic who converted to Islam in 1982, he became widely recognized for presenting Islam from the perspective of an academic and convert, particularly addressing questions about faith, reason, and the Qur’anic message.

Lang is best known for his books Struggling to Surrender: Some Impressions of an American Convert to Islam, Even Angels Ask: A Journey to Islam in America, and Losing My Religion: A Call for Help. His works explore his personal spiritual journey, his reflections on the Qur’an, and the challenges faced by Muslims living in Western societies.