The book consists of (another) translation of the original Sun Tzu text (40 of 200 pages), followed by the authors' application of everyday life, with an emphasis on business. The book also contains quite a number of citations from other military works/personnel.
My impression was that the authors collected a handful of tips, strategies and methods for the latter (nothing was new for me really), then, for each, tried to find a passage in Sun Tzu's text suitable for it's substantiation.
Partially, they fail miserably. Example: "Use the normal force to engage, use the extraordinary to win". If you have read Sun Tzu, you know that he advocates building an extraordinaray, elite force (of soldiers), which is then to be used as a spearhead in battle, or when battling for key postions, or in key endeavors.
The application to business life might well seem to use extraordinary resources, such as over-average salespersons, extra nice meeting locations etc. for key opportunities, while regular business will be dealt with normal assets.
The authors instead argue that you invest your time where it will yield the most rewards (note that this does not address the distinction between regular and extraordinary "forces"; being efficient is, moreover addressed seperately by Sun Tzu), then continue about how winning decisively is of importance (sure is, but is covered by yet another chapter of Sun Tzu).
There are countless other examples. Some interpretations were more satisfying, but only few were surprising.
A relevant part of the book is self-marketing by the authors showing that they have a broad knowledge of military prominence, but unfortunatley give the impression they have either not understood their works, or bent their meaning to better fit "the point".
The business experience presented, used to illustrate certain points, also failed to convince me I was reading a book of someone experienced in strategic decisions, or business. Small stuff mostly, really, and rarely containing strategy.
Overall: I love the Sun Tzu original, and ever since I heard that there exist business interpretations of it in Southeast Asia, I wondered how the astounding depth, yet clarity of this text may be translated into, adapted to, modern, non-military life.
After reading this book, I still wonder.