Published by Lond. The Folio Society., 2007
Seller: The Antique Bookshop & Curios (ANZAAB), Crows Nest, NSW, Australia
Or.pictorial.boards. Qtr.cloth. b/w plates. Very good copy. 1st Folio Society ed. In the slip-case. The Double-Cross System was a WWII counter-espionage operation that broadcast disinformation to Nazi agents in Britain. John Cecil Masterman oversaw this operation using the Roman numerals of XX.