books.google.com - For a soldier, knowing where you are is a matter of life and death, and so it comes as no surprise that the Army has produced the most complete, clear, and thorough guide to map reading and navigation available. The book starts with a comprehensive explanation of the meaning and uses of maps, whether...http://books.google.com/books/about/U_S_Army_Map_Reading_and_Land_Navigation.html?id=HCHEe1544HsC&utm_source=gb-gplus-shareU.S. Army Map Reading and Land Navigation Handbook