THE HIDDEN WORLD Tapa dura - 1976

London : R. Hale, 1976. First Edition. Hardback. An exceptional copy; fine in an equally fine dw. Particularly and surprisingly well-preserved; tight, bright, clean and especially sharp-cornered. Literally as new. ; 207 pages; Description: 207 p. ; 23 cm. Includes bibliographical references and index. Subjects: Cryptography --History.

London : R. Hale, 1976. First Edition. Hardback. Fine cloth copy in an equally fine dw. Particularly and surprisingly well-preserved; tight, bright, clean and especially sharp-cornered. ; 207 pages; Description: 207 p. ; 23 cm. Includes bibliographical references and index. Subjects: Cryptography --History.

London : Hale, 1976. First Edition. Hardback. Very good copy in a good, very slightly edge-nicked and dust-dulled dw, now mylar-sleeved. Remains particularly and surprisingly well-preserved overall; tight, bright, clean and strong. Provenance: From the library of L. P. Coomer with personalized bookplate to front pastedown. Minor library marks remain. ; 8vo 8"" - 9"" tall; 207 pages; Physical desc. : 207 p. ; 23 cm. Notes: Bibl. : p.191-200. - Index. Subject: Cryptography - History.

London: Robert Hale, 1976. First Edition. . Hardcover. Fine/Fine. 207pp, hc, fine in dj. The story of codes, ciphers and secret writing. Size: 8vo

Robert Hale, 1976. First Edition. Hardcover. Very Good. 1976 FIRST U.K. EDITION hardcover with dust jacket. APPEARS UNREAD with unmarked, crisp-edged, well-bound pages. Jacket shows minor shelf-rubbing and minor edge wear only. A very good, collectible copy! From the jacket description: "In this book the author sets forth the story of hidden writing from earliest times to the present. In simple terms he explains how ciphers and codes work and how they are unravelled, how the Arabs discovered the constancy of letter frequencies and their remarkable forms of invisible ink. Illustrating the vital importance of security, he explains how in World War II fifty German code breakers, a terribly efficient enemy, kept the U-boats posted with our convoy movements...The author writes with intimate knowledge of combining security with the use of words.

Robert Hale, 1976. Book. Very Good. Hardcover. 1st Edition. 207pp. Tight copy in mylar-protected dust jacket..