I can just imagine how intrigued and fascinated my own children would have been had this book been available when they were growing up。 Mysterious and hidden secretive things and ways of behaving are always an allure to kids。 Well， if we admit it， grown ups as well。 Else， why in the world would the James Bond 007 series been so fascinating and other spy stories。National Geographic has this engaging system of presenting a lot of information in a limited amount of space and in the process stimulat I can just imagine how intrigued and fascinated my own children would have been had this book been available when they were growing up。 Mysterious and hidden secretive things and ways of behaving are always an allure to kids。 Well， if we admit it， grown ups as well。 Else， why in the world would the James Bond 007 series been so fascinating and other spy stories。National Geographic has this engaging system of presenting a lot of information in a limited amount of space and in the process stimulating the reader's mind so much that he or she continues to pursue the subject via other sources。In TOP SECRET！ not only does the reader learn about spies and their methodology from times past but they have the opportunity to pursue code breaking themselves。 And the book also entails hidden secrets in the world about us that are not part of the game of spying。 Example: a huge hidden cave in Vietnam that actually has trees growing in it。 Can you imagine？I know just the youngster to whom I'm going to gift this over-size book jam packed with fascinating information。 I received a complimentary copy to facilitate a review。 Opinions are mine， alone and are freely given。 。。。more