A small group of Wall Street guys have figured out that the U.S. stock market has been rigged for the benefit of insiders and that, post-financial crisis, the markets have become less free and more controlled by the big Wall Street banks. Michael Lewis explains flash trading and looks at the high-tech predator stalking equity markets. His new book Flash Boys shines light into the darkest corners of the financial world and tells the story of people who have somehow preserved a moral sense in an environment where you don’t get paid for that; they have revealed an institutionalized injustice and are willing to go to war to fix it.