Decade's Most Important Copyright Case

Many college students resell their textbooks online. But Supap Kirtsaeng turned textbooks into a profit machine, and his homegrown business is now at the center of a lawsuit that some observers call the most important copyright case in nearly a decade. The U.S. Supreme Court heard arguments in the case on Monday. Here's a guide to what the case means, and how it could send ripples far beyond college campuses.