Who Will Dominate The Electronic Textbook Market? - San Francisco Chronicle http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNEr39JJW-c8n0Xivvd4cSHkz2rF8Q&url=http://www.sfgate.com/cgi-bin/article.cgi?f%3D/g/a/2011/09/13/investopedia59681.DTL