People are constantly giving you information.

The question is whether you're actually reading it, or simply seeing what you expect to see.

A change in someone's tone. An answer that suddenly becomes vague. A promise that never quite turns into action. Confidence that disappears when the pressure rises. These things can tell you something, but only if you resist the temptation to jump straight from observation to certainty.

The Spycraft of Reading People takes a different approach to understanding human behavior. Drawing on principles from intelligence analysis, behavioral research, and information-gathering tradecraft, P.J. Agness shows how to separate what you observe from what you assume, establish a useful baseline, recognize meaningful changes, ask better questions, evaluate motives, and test competing explanations before deciding what you believe.

This isn't a dictionary of body-language tricks. Crossed arms don't automatically mean resistance. Nervousness isn't proof of dishonesty. Confidence isn't the same thing as competence. Human beings are considerably harder to decode than that.

Instead, you'll learn a disciplined method for making sense of people when the evidence is incomplete: observe, establish context, notice change, generate explanations, seek more information, test, and update.

Use it at work. Use it in relationships. Use it when someone's story doesn't quite add up, when you're deciding whom to trust, or when the stakes are high enough that guessing isn't good enough.

You won't finish this book believing you can read minds.

You'll finish it better equipped to read people.