Well, there is nothing new here. It is mainly a very basic book that some newly educated B.Sc. could get something out of, as a starter to the consulting business. It is not bad, it just doesn't really contain any valuable information. And a quick check of the authors company shows a small boutique shop with 7 employees that barely breaks even.

If you have never been exposed to the management consulting business (as a consultant or a consultant user) before, this may scratch the surface, but it wont do more than that. There are both better books as well as better written books out there.