Malcolm Gladwell, the #1 bestselling author of The Tipping Point, Blink, Outliers, and What the Dog Saw, offers his most provocative—and dazzling—book yet. Three thousand years ago on a battlefield in ancient Palestine, a shepherd boy felled a mighty warrior with nothing more than a stone and a sling, and ever since then the names of David and Goliath have stood for battles between underdogs and giants. David's victory was improbable and miraculous. He shouldn't have won. Or should he have?