One of the most influential analytic philosophers of the late twentieth century, William P. Alston is a leading light in epistemology, philosophy of religion, and the philosophy of language. In this volume, twelve leading philosophers critically discuss the central topics of his work in these areas, including perception, epistemic circularity, justification, the problem of religious diversity, and truth. Together with Alston’s vigorous responses, these articles make significant new contributions to the literature and will be of interest to a wide range of philosophers and students. In addition, the volume contains a comprehensive introduction and overview of Alston’s work and a complete bibliography of his publications