Speak of the Devil is the first book-length study of The Satanic Temple. Joseph Laycock, a scholar of new religious movements, contends that the emergence of "political Satanism" marks a significant moment in American religious history that will have a lasting impact on how Americans frame debates about religious freedom. Though the group gained attention for its strategic deployment of outrage, it claims to have developed beyond politics into a religious movement. Equal parts history and ethnography, Speak of the Devil demonstrates why religious Satanism is significant to larger conversations about the definition of religion, religious freedom, and religious tolerance.