TWO WORKS OF NICCOLO MACHIAVELLI
The seven books on the art of war
http://www.pdfarchive.info/pdf/M/Ma/Machiavelli_Niccolo_-_The_seven_books_on_the_art_of_war.pdf

The Prince
http://www.pdfarchive.info/pdf/M/Ma/Machiavelli_Niccolo_-_The_prince.pdf