JF Ptak Science Books
Shannon, Claude: Communication Theory of Secrecy Systems; NYC: ATT, 1949. Published in The Bell System Technical Journal, vol 27, October 1949, No. 4 8vo. Offered in its original printed wrappers, and in fine condition. . This is the great standard and first classic modern paper on computers and cryptology. $800.00
This is a very nice copy of this work, with only a short tear at the top of the spine and some slight fading around the wrapper edges. (The rich and dark blue wrappers used by Bell for this publication just didn't stand up to the test of time--here, even not exposed to any light or use for years, the wrappers still have started to fade. I make this to be a standard condition for a nice, acceptable copy coming from this journal. There is a rubber stamped date on the front wrapper (Nov 30 1949).