"An award-winning psychologist reveals the hidden power of our inner voice and shows how we can harness it to live healthier, more satisfying, and productive lives. Tell a stranger that you talk to yourself, and you're likely to get written off as eccentric. But the truth is that we all have a voice in our head. When we talk to ourselves, we often hope to tap into our inner coach but find our inner critic instead. When we're facing a tough task, our...