Book excerpt: The Religious Polemics of the Muslims of Late Medieval Christian Iberia examines the corpus of polemical literature against the Christians and the Jews of the protected Muslims (Mudejars). Commonly portrayed as communities in cultural and religious decay, Mònica Colominas convincingly proves that the discourses against the Christians and the Jews in Mudejar treatises provided authoritative frameworks of Islamic normativity which helped to legitimize the residence of their communities in the Christian territories. Colominas argues that, while the primary aim of the polemics was to refute the views of their religious opponents, Mudejar treatises were also a tool used to advance Islamic knowledge and to strengthen the government and social cohesion of their communities.