There were 11 books in this series as of 1979. The one I have is titled Olympia publised in 1979 in Athens, it does not have an ISBN. It is an excellant referance source being mostly pictures, over sized, 52 pages, in English. It details the ruins and artifact found at Olympia as detaled by Prof. Manolis Andronicos, Professor of Archeology, University of Thessalonike.