Contemporary composition's equipment for knowledge making is an ample assortment of theories and methods from Western social science and humanities traditions, as well as, increasingly, non-Western traditions. These are applied to an ever-growing list of locations, events, and subjects of writing, rhetorics, and literacies. Periodically, the field assesses, celebrates, or simply takes stock of its knowledge and knowledge-making equipment. This tradition indicates the field's willingness to ask itself difficult questions about how and what it knows, and for whom. Taken separately, each book under consideration here by the author, represents an established epistemological perspective in composition. According to the author, the field's tradition of self-reflection suggests that composition will continue to try to account for its epistemological breadth and depth. On one hand, at stake is the field's ability to describe itself accurately and comprehensively to people in other fields and other professions, especially those that brush up against it. But on the other hand, and perhaps more important, also at stake is the field's ability to understand itself, particularly as it and its participants become more inclusive, more diverse, and global.