The great walled castles of the medieval world continue to fascinate the modern world. Today, the remains of medieval forts and walls throughout Europe are popular tourist sites. Unlike many other books on castles, The Medieval Fortress is unique in its comprehensive treatment of these architectural wonders from a military perspective. The Medieval Fortress includes an analy...(展开全部)

A masterful thriller by the author of the #1 New York Times bestseller The Da Vinci CodeWhen the NSA's invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls its head cryptographer, Susan Fletcher, a brilliant, beautiful mathematician. What she uncovers sends shock waves through the corridors of power. The NSA is being held hostage-not b...(展开全部)

An insightful and entertaining work...gains resonance from its large and momentous backdrop of China in transition. (The New York Review of Books, Pankaj Mishra) --This text refers to the Paperback edition.

From the bestselling author of The Da Vinci Code comes the gripping story of the ultimate code. It's powerful, dangerous--and unbreakable . . . When the NSA's invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls its head cryptographer, Susan Fletcher, a brilliant and beautiful mathematician. What she uncovers sends shock waves through ...(展开全部)

An insightful and entertaining work...gains resonance from its large and momentous backdrop of China in transition. (The New York Review of Books, Pankaj Mishra) --This text refers to the Paperback edition.

A masterful thriller by the author of the #1 New York Times bestseller The Da Vinci CodeWhen the NSA's invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls its head cryptographer, Susan Fletcher, a brilliant, beautiful mathematician. What she uncovers sends shock waves through the corridors of power. The NSA is being held hostage-not b...(展开全部)

From the bestselling author of The Da Vinci Code comes the gripping story of the ultimate code. It's powerful, dangerous--and unbreakable . . . When the NSA's invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls its head cryptographer, Susan Fletcher, a brilliant and beautiful mathematician. What she uncovers sends shock waves through ...(展开全部)

Before the multi-million, runaway bestseller "The Da Vinci Code," Dan Brown set his razor-sharp research and storytelling skills on the most powerful intelligence organization on earth--the National Security Agency (NSA), an ultra-secret, multibillion-dollar agency many times more powerful than the CIA. When the NSA's invincible code-breaking machine encounters a mysterious cod...(展开全部)