Kim Yol-kyu is Dignified Professor of Korean Studies at Keimyung University in Daegu, Korea, where he also directs the Academia Koreana.

A New York Times-Bestseller! Could books hidden through Book Scavenger be linked to an arsonist's web of destruction? Find out in Book 2 of Jennifer Chambliss'

A TV tie-in edition of The Code Book filmed as a prime-time five-part Channel 4 series on the history of codes and code-breaking and presented by the author. Th

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Learn to create secret codes using symbols, dots, lines, rearranged letters and more.