Are Your Lights On?

A book I recently read and can recommend is "Are Your Lights On?" from Gerald M. Weinberg.
It is divided into six parts which are:

1.What is the problem?
2.What is the problem?
3.What is the problem, really?
4.Whose problem is it?
5.Where does it come from?
6.Do we really want to solve it?

It´s easy to read, contains some interesting (but not necessarily new) concepts and can maybe be part of your consultant tool box when trying to get things accomplished.
Weinberg has published various books which emphasizes, that problem solving is not a technical issue but has to do with how you think and which point of view you take into consideration.