276 pages, indexed. Apart from a neat ownership signature, a clean, unmarked and solid copy. A title in the Papermac series. 'Sir Alfred Jules "Freddie" Ayer FBA 29 October 1910 - 27 June 1989),usually cited as A. J. Ayer, was an English philosopher known for his promotion of logical positivism, particularly in his books Language, Truth, and Logic (1936) and The Problem of Knowledge (1956). (Wikipedia)