Wilfrid Sellars was and remains one of the most prominent and important twentieth-century philosophers. Jay Rosenberg brings together his previously published studies of the central elements and implications of Sellars' philosophy, along with three new essays that further highlight and articulate the significance of his work. I have thought for many years that Rosenberg is one of the most underappreciated philosophers around. His writing is really first-rate: clear, well-structured, with an excellent sense of expository order and style, a keen eye for the joints of a philosophical dialectic, and a nose for cogent argument...This book will be indispensable for thos interested in Sellars and his Pittsburgh descendants. But it contains a great deal of good philosophy that will be profitably chewed upon by anyone interested in fundamental issues in mataphysics and epistemology. I do so wish that Jay had been able to stick around and write more things likfe these essays!