This book is quite effective (maybe too effective) at translating police interrogation tactics in a way that you can use in everyday conversations, and like the literature says, you don't have to be overly inquisitive or accusatory to make them work. I say 'maybe too effective' because I'm not sure that the average person needs to be privy to this infromation. Like the author, I'm a former police officer. I liked the book, and as above, it's highly effective--but this is material that the average officer doesn't even know, much less the average citizen. It is powerful stuff--if these principles of conversation have been used to get suspects to confess to murdering antoehr person, it's easy to see that they would be powerful in everyday conversation. I can see that it would give great advantage to people in sales, management, personal relationships, etc, or anyone, really, who doesn't care to be duped. I give it 5 stars because it's that good; I can't in good conscience give it less, though I have to disagree with Mr. Nance putting out material that has until now been known only to a select group of people (trained police investigaors).