Hidden Codes & Grand Designs - Secret Languages From Ancient Times To Modern Day

Did the Masons encode messages in wallsand even in the street planof Washington, D.C.? Does the Hebrew Bible conceal hiddenmysteries? Ingenious methods for encoding secrets have taken manyamazing turns down through the ages, from the military signals theRomans flashed from hilltop to hilltop, to the computer codes thatguard your cash at the ATM. Pierre Berloquin, one of France'sleading puzzle book authors, takes you on a tour of them all in abook full of astonishing historical insights. With more than 150brain-teasing problems for readers to solve for themselves, this isa journey into the how-to of codes, ciphers and other secretcommunication systems.