Berkeley's Principles: Expanded and Explained includes the entire classical text of the Treatise Concerning the Principles of Human Knowledge in bold font, a running commentary blended seamlessly into the text in regular font and analytic summaries of each section. The commentary is like a professor on hand to guide the reader through every line of the daunting prose and every move in the intricate argumentation. The unique design helps today's students learn how to read and engage with one of modern philosophy's most important and exciting classics.