Steve Jackson Games has a similar approach to protecting their ebooks: http://e23.sjgames.com/faq.html#protected http://e23.sjgames.com/faq.html#protected > Q

Steve Jackson Games has a similar approach to protecting their ebooks: http://e23.sjgames.com/faq.html#protected http://e23.sjgames.com/faq.html#protected > Q. Are the files in e23 copy protected? > A. No. That would interfere with your use of them.