Cool book: Harré, Psychology for a Better World

Came across this cool book on using psychology to promote environment-friendly behavior. 

Some of the things that make it cool:

1. It presents behaviorally realistic synthesis of social norms, emotions, & reciprocity, on the one hand, and mechanisms of risk perception/cognition, on the other. 

2. It strikes a nice balance between exposition/analysis and programmatic advice.

3. It is well written & draws on lots of interesting sources.

4. The author is distributing .pdf version for free -- a gesture that provokes motive to reciprocate by producing and sharing knowledge in turn (a big theme of the book is the potential of pro-social behavior to reproduce itself by furnishing an inspiring model).