Chris L. Firestone and Nathan Jacobs integrate and interpret the work of leading Kant scholars to come to a new and deeper understanding of Kant's difficult book, Religion within the Boundaries of Mere Reason. In this text, Kant's vocabulary and language are especially tortured and convoluted. Readers have often lost sight of the thinker's deep ties to Christianity and questioned the viability of the work as serious philosophy of religion. Firestone and Jacobs provide strong and cogent grounds for taking Kant's religion seriously and defend him against the charges of incoherence.In their reading, Christian essentials are incorporated into the confines of reason, and they argue that Kant establishes a rational religious faith in accord with religious conviction as it is elaborated in his mature philosophy. For readers at all levels, this book articulates a way to ground religion and theology in a fully fledged defence of Religion which is linked to the larger corpus of Kant's philosophical enterprise.