If you have a technical problem, to their credit, they will work with you. If you have to replace your computer, or the printer jams, or something like that, they'll accomodate. Contact Jeff Kennedy at WEX. You can probably get him via awspubs.com.
But no, you can't put the file on both your desktop and your laptop (even though a lot of commercial software will allow exactly that kind of duplicate installation). And if you want a "library" copy for everyone to use, you can do that with a book but with the electronic version you'll have to pay $$$$ for a site license. AWS has told me "it's just like the book, you only get one copy" and I laugh. It's just like the book--if I stapled the back cover to my desk. The electronic copy is *less* usable than the paper copy and that flies in the face of what the electronic age is supposed to provide.
I understand copyright and piracy concerns too, but they're going way the hell overboard. There's no reason for AWS to have significantly stricter restrictions than the software, music, and home-viewing movie industries, which make a much higher portion of their income from media sales.
Apparently they're selling plenty of 'em, though. I guess most people find the searchability and immediate download worth all the other troubles, or else they just sit at one desk and it never occurs to them to try to use their code anywhere else.
Hg