8vo, IV, 815pp. Hardcover in blue cloth in very good condition with an attractive gilt signature embossed on the front board and an unfaded title on a firm spine though only trimmed d/w remnants are present inside, and there is minor flecking present on the front edge, text is really in excellent condition throughout with only light paper tanning and a prior owner’s dated name-stamp neatly adorning the ffep. This volume is one of the most significant documents on the thoughts of the giant of twentieth- century philosophy and is Vol. V in the Library of Living Philosophers. An essential treatise for all students of philosophy.