This book, which containing 3 war classics, is extremely interesting and highly recommendable to all of those who are interested in military strategy, both beginners and non-beginners.
There are a lot references to Clausewitz but still a lot of episodes are analysed and explained which I'm pretty no one knows...
These books were all written before ww2 so they are mainly focused in analysing ww1.
I found extremely interesting and useful the book "SURPRISE" which points surprise as the main goal for any operation (tactical and when possible strategical) and as the only real key to victory. Also "DEFENCE" is very interesting and not at all in opposition with the surprise concept.
I personally didn't like the 3^ book which is more of a ensemble of episodes without any chronological timeline. Still interesting is some of the ideas.