Nowadays, the world's money is traded by computer code, inside black boxes in heavily guarded buildings. Even the experts entrusted with your cash don't know what's happening to it. In Flash Boys, Michael Lewis tells the explosive story of how one group of ingenious oddballs and misfits set out to expose what was going on. It's the story of what it's like to declare war on some of the richest and most powerful people in the world. It's about taking on an entire system. And it's about the madness that has taken hold of the financial markets today.