Well, it is not often you come across a full-blown guide to what management consultants really do for a living, but this is the closest I ever have seen.

It manages to describe many (not all) major models that MCs utilise and sort them in different areas (who sounds like a industry segmentation of the MC industry, no less), and adds to this well-thought out comments on their applicability and in some cases, interdependencies. Of course, you really need an MBA (or at least have started on one) to fully appreciate the book, but this is the intended audience, so kudos for a work very well done!

All in all, a recommended book for any practising or aspiring management consultant. If you want more details or a more all-encompasing book, there exists alternatives, but not for this audience.