Nick Cooney has summarized numerous studies and presented the results for laymen easily understandable and readable. The book can be read problem with good English school. Although it comes in the book mainly to animal rights, many of the tips can be believed but also in other topics apply. The book is interesting not only for activists, but everyone who participates in discussions or debates, because you can avoid psychological traps and argue effectively.
The book laudably contains a large list of source documents.