Reza Aslan is an Iranian-American scholar of sociality, writer, and television host. A convert to evangelical Christianity from Shia Islam as a youth, Aslan eventually reverted to Islam but continued to write about Christianity. He has written four books on religion: No God but God: The Origins, Evolution, and Future of Islam, Beyond Fundamentalism: Confronting Religious Extremism in the Age of Globalization, Zealot: The Life and Times of Jesus of Nazareth, God: A Human History and in 2022 An American Martyr in Persia: The Epic Life and Tragic Death of Howard Baskerville.

No god but God: The Origins, Evolution, and Future of Islam is a 2005 non-fiction book written by Iranian-American Muslim scholar Reza Aslan. The book describes the history of Islam and argues for a liberal interpretation of the religion. It blames Western imperialism and self-serving misinterpretations of Islamic law by past scholars for the current controversies within Islam, challenging the "clash of civilizations" thesis.