This volume is the first to assemble the writings that Kant published to popularize, summarize, amplify and defend the doctrines of his masterwork, the 1781 Critique of Pure Reason. The Prolegomena is often recommended to students, but the other texts are also important representatives of Kant's intellectual development. The series includes copious linguistic notes and a glossary of key terms. The editorial introductions and explanatory notes reveal much about the critical reception given Kant by the metaphysicians of his day as well as his own efforts to derail his opponents.