I had always known about this book. First of all I didn't really get much out of it because the audiobook reading of it was a bit lacklustre and boring.

I do have a idea now what it is about and will keep it in mind if I am planning to invade a neighbouring country. I can see that it does contain good advice in this situation.

To get the most out of it you probably need
some kind of annotated version to understand the historical context of what he is saying.