Not only do we need more female leaders at the top, but we need more women at all levels of business, government, and nonprofits to step up—there's no time to waste. The problem, says Helene Lerner, isn't so much that women lack confidence but that they misunderstand what confidence really is.

True confidence isn't fearlessness; it's having the courage to jump in even when your knees are shaking. Any woman who waits until she feels 100 percent confident before offering a big idea or asking for a raise or promotion will never get anywhere. Drawing on her own and other female leaders' experiences, as well as on her survey of over 500 working women, Lerner lays out practical strategies for beating this confidence myth and overcoming obstacles like gender bias. The book features dozens of Confidence Sparks, simple but powerful exercises and techniques that can catapult anyone's career to the next level.