El Arte de La Guerra
Over 13 battles, each a separate chapter, The Art of War details the stratagems of a general that led to the many victories he attained. Far more than some mere military strategy, this lays out an entire philosophy of war. For over two millennia now, military and other leaders have approached this book as an obligatory and foundational reference. For ourselves, for the daily battles we have to engage in, we also deserve this powerful ally in our pocket so that the victories that always accompanied Sun Tzu may also shine down on us.