"What is at stake here is the cognitive efficacy of man's mind." The Objectivist, 120 Est 34 St. NY, 1967. First Appearance in book form Here, Ayn Rand unravels her theory of concepts, her ground-breaking explanation of the relationship between abstractions and concretes. PO's signature on front blank page. No other writing or markings of any kind. Minor soiling on covers. A beautiful, bright first printing and most desirable Rand acquisition. Book#P7167. $125. We carry the world's largest collection of rare, signed, and manuscript Ayn Rand on the planet!. Seller Inventory # 000377