3.5 to 4 stars - half a star rating more than what I initially wanted to give. 
 I tried to avoid this book at the second-hand bookstore for a long time until one day I picked it up & read excerpts of it at random. Needless to say, I was impressed & I bought it. 
 Essentially a war manual, 'The Art of War' by Sun Tzu is not all about war & peace. Being non-fiction (and moreover, philosophy) I decided to go slow & take my time getting through 100 odd pages of this book. But the end result was quite satisfactory & when you're done reading, you'll be amazed by the relevance it has even today. The principles that were written back in 400 BC can be applied not only in military conflict but even in the corporate world by businesses all over the world to gain mileage over their rivals. Despite this not being what I usually read, 'The Art of War' is a timeless classic. Recommended.