Pretty clear and comprehensive as far as information goes, if you can bear the fact that it is badly written (grammatical mistakes abound on every page) and it obviously wasn't edited carefully or at all. Written from the perspective of those who assume their readers to be religious (one of the authors is a 'pastor') and in places addressing what they assume to be a male readership. Weird! I'm going to have to use it, though.
US shoppers click here:
The User's Manual for the Brain