Petitioner Supap Kirtsaeng in 2014. (credit: Doug Kari)

Supap Kirtsaeng built himself a business on eBay buying textbooks in Asia and reselling them to students in the US. That practice made him the target of a copyright lawsuit by John Wiley & Sons, a large textbook company that didn't like Kirtsaeng undercutting their US prices. Lawyers for Wiley said...