Quote:
Originally Posted by JSWolf
But the reason it would be copied is so it could be printed.
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Don't forget, Jon, PDF does have a function. It is perfectly suited for people who read texts on computers and laptops... which is how many students do it. There may not be a dedicated reader good for textbooks yet, but laptops and PCs combined with PDF files work fine.
I think the "registered key" idea mentioned earlier would probably be your best bet for providing electronic files and making sure everyone paid for their copy (that method does work when you are limiting your output to smaller groups, and can issue a manual key... or, with larger groups, when your sales/distribution chain can issue keys that you can verify later).