Do you believe in telling the truth? Sure you do. But even that's a lie -- because we all lie. Whether to protect a friend, to make someone feel better, or to avoid telling even bigger lies later, lying is actually central to human nature. Usually we're taught that lying is bad, and that's that. But in reality, it's rarely so black and white.

Kira Vermond's latest book answers questions like: Why do we lie? What types of lies are there? What are the consequences of lying? What methods are used to detect lies? And when is it okay or even good to lie?

From forgeries and hoaxes to...