This 2021 textbook provides a unique approach to reading philosophy, requiring students to engage with material as they read. It contains carefully selected texts, commentaries on those texts, and questions for the reader to think about as they read. It serves as starting points for both classroom discussion and independent study. The texts cover a wide range of topics drawn from diverse areas of philosophical investigation, ranging over ethics, metaphysics, epistemology, philosophy of mind, aesthetics, and political philosophy.