Costco, eBay, Google and the nation's top art museums are backing a Thai graduate student against book publishers, the movie and music industries and other manufacturers in a Supreme Court battle over copyright protections. The student was studying in the United States when he decided to tap into the market for cheaper college textbooks. He resold copyrighted books that relatives first bought abroad. His profitable venture provoked a copyright infringement lawsuit from publisher John Wiley & Sons. The case is being argued Monday at the high court. The Supreme Court case concerns what protection the holder of a copyright has after a product made outside the United States is sold for the first time.