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7.5x7.5" 68 Pages A History of Murphy's Law Murphy's Law is one of the most well-recognized statements of philosophy known to man. Tipped off by his next door neighbor that Murphy may have worked at Edwards Air Force Base,...

5x8" 90 Pages M-209 Converter Encryption Machine Technical Manual 1944 Revised EditionDesigned by Swedish cryptographer Boris Hagelin, the M-209 Converter was a portable, mechanical cipher machine. Used extensively during...

8.25x6" 42 Pages Originally invented in 1911, the Erector construction toy was patented in 1913, and became one of the most important and beloved children's toys of the 20th Century. Originally manufactured by the Mysto...