London: Macmillan and Co., Limited, 1940. First edition. Hardcover. 8vo. , vii-x, 276 pp. Blue cloth with gold lettering on the spine. Price of 10s. 6d. net on the front flap of the jacket. Slater 28. A.J. Ayer's third book, an exploration of the philosophy of metaphysics and epistemology. He discusses problems like the nature of the reality of the external world, how sense data relates to material things, causality, and how an individual can have knowledge of other minds. Ayer was an important figure in the movement of Logical Positivism, and a significant analytic philosopher. His contributions to epistemology and metaphysics remain critical in the literature of analytic philosophy. Very Good / Very Good. Item #00009832
Slightly askew with a touch of warping to the front board; jacket shows a few traces of edge wear, toning, and a few small spots of discoloration to the rear panel.