Amie L. Thomasson, the Daniel P. Stone Professor of Intellectual and Moral Philosophy at Dartmouth College, has gained international recognition as a leading figure within various areas of philosophy. She has recently been celebrated as one of the most influential living philosophers for her significant contributions to metaphysics, ontology, phenomenology, and aesthetics. By engaging critically with her approach to metaphysics, modality, conceptual analysis, and the methodological issues concerning ontological questions about ordinary objects, social entities, and fictional characters, as well as including a chapter from Thomasson herself where she makes explicit the internal connections which run through her body of work, this volume delivers the first thorough discussion of Thomasson philosophy.