books.google.com - For centuries, the ninja has occupied a unique place in Japanese culture, straddling the border between fact and folklore. Through classical art, traditional proverbs, and superb research, this exquisitely designed volume takes a look back into the origins and history of these notorious “shadow warriors.”...http://books.google.com/books/about/Ninja.html?id=Fdxk3Mbe0ckC&utm_source=gb-gplus-shareNinja
