First edition, first printing of this history of the Black Chamber, also known as the Cipher Bureau, which was the United States' first peacetime cryptanalytic organization and a forerunner to the National Security Agency. The cryptography historian David Kahn called this book "the most famous book on cryptology ever published."
Indianapolis, IN: The Bobbs-Merrill Company, 1931. Black boards stamped in red, red topstain, pp. 375,  p. of plates, illustrated throughout. A very good copy in a good, unclipped ($3.50) dust jacket. Binding sturdy with the front hinge starting, light wear to boards with a few instances of discoloration, minor offsetting to endpapers, internally clean with no markings. Jacket shows general wear and rubbing with chipping, loss at spine crown, protected in archival mylar. Scarce, particularly in the jacket.
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