Lawers specializing in intellectual property explain how proprietors of video games and virtual worlds can obtain and protect standard tools of intellectual property law--copyright, trademark, patent, and trade secret--for their goods. They cover end-user license agreements, copyright law implications, real-world patent issues, implications in trademark law, the law of trade secrets, and international considerations of virtual worlds. Annotation ©2010 Book News, Inc., Portland, OR (booknews.com)