The growth of Islam both worldwide and particularly in the United States is especially notable among African-American inmates incarcerated in American state and federal penitentiaries. This growth poses a powerful challenge to American penal philosophy, structured on the ideal of rehabilitating offenders through penance and appropriate penal measures. Islam in American Prisons argues that prisoners converting to Islam seek an alternative form of redemption, one that poses a powerful epistemological as well as ideological challenge to American penology. Meanwhile, following the events of 9/11, some prison inmates have converted to radical anti-Western Islam and have become sympathetic to the goals and tactics of the Al-Qa'ida organization. This new study examines this multifaceted phenomenon and makes a powerful argument for the objective examination of the rehabilitative potentials of faith-based organizations in prisons, including the faith of those who convert to Islam.