The edition narrated by John Brown (rated 4.6) is no longer free. The deal has been replaced with a newer, slightly longer edition narrated by Kenneth Elliot which remains free. — editor
The Art of War, literally The Laws of War by Master Sun is the most famous ancient Chinese treatise, dedicated to a military strategy and policy, written by Sun Tzu.
The treatise Sun Tzu - Art of War influenced crucially on a whole military art of the East. Although it is the first treatise on the military art, it includes clearly expressed common principles of strategy as well as tactics. A special place in a military theoretical literature belongs to comments on Sun Tzu, the earliest of which appeared in the Han era (206-220 AD), and the new ones are still being created…
The Art of War is one of the best works about military strategy. There are also other books known:
Niccolò Machiavelli - The Art of War, Frontinus - Strategemata (Stratagems), Xenophon - Anabasis (The March of the Ten Thousand)