This volume provides a rich collection of original essays on Aristotle's metaphysics written by sixteen prominent scholars in the field. Honouring the seminal influence of David Charles to philosophical scholarship, it offers fresh interpretations and assessments of Aristotle's thinking in metaphysics and related areas such as philosophy of language, psychology, natural philosophy, and mathematics. The collection contributes to the recent resurgence of interest in Aristotelian metaphysics, furthering our understanding of Aristotle's seminal contribution to the history of western philosophy. It evaluates key features of Aristotle's metaphysical thinking: his accounts of definition and meaning; his understanding of being and the categories; his models of explanation, causation, and accounts of modality, space, and change. The chapters are written with clarity and attention to the detail of Aristotle's texts but presuppose no knowledge of ancient Greek and can be read with benefit by advanced philosophy students and scholars.