Since the early 1960s, incarcerated Muslims have used legal action to establish their rights to religious freedom behind bars and improve the conditions of their incarceration. Inspired by Islamic principles of justice and equality, these efforts have played a critical role in safeguarding the civil rights not only of imprisoned Muslims but of all those confined to carceral settings. In this sweeping book--the first to examine this history in depth--SpearIt writes a missing chapter in the history of Islam in America while illuminating new perspectives on the role of religious expression and experience in the courtroom.