Calvin Coolidge (The American Presidents)

202 pp. He was known as "Silent Cal." Buttoned up and tight-lipped, Calvin Coolidge seemed out of place as the leader of a nation plunging headlong into the modern era. His six years in office were a time of flappers, speakeasies, and a stock market boom, but his focus was on cutting taxes, balancing the federal budget, and promoting corporate productivity. "The chief business of the American people is business," he famously said.