Learn to EarnMutual fund superstar Peter Lynch and author John Rothchild explain the basic principles of the stock market and business in an investing guide that will enlighten and entertain anyone who is high school age or older. Many investors, including some with substantial portfolios, have only the sketchiest idea of how the stock market works. The reason, say Lynch and Rothchild, is that the basics of investingthe fundamentals of our economic system and what