Take at look at this site:
http://www3.telus.net/linguisticsiss...anAmerican.htm It looks to me like Canadian spelling is closer to UK spelling than American. And your forgetting about words like centre instead of center. Its just that with ebooks how hard would it be to change the spelling? It is not like I am asking the to get one factory to print books with more than one spelling. Computers could convert the spelling on an entire ebook in less than a second!