First published in 1971, reprinted (the printing of this copy) with corrections in 1974. Light blue dust jacket, black cloth-covered boards, silver titles to spine, 192 pages including index, illustrations from photographs. Related material left laid in. While the author was a POW in Colditz Castle, he was continually sending messages in code to British Intelligence. The book includes a selection of the letters with instructions for decoding. Condition: A very little bumping to the corners of the boards, some edge wear to the dust jacket, including some chipping along the back top edge; the dust jacket is not price clipped.