[campfireveteran]

Encrypted "borrowed" DRM books that self-destruct after a certain period of time (like many of those historic tech books on Internet Archive) are garbage and a waste of my time. I'll either borrow the real thing or steal a DRM-free ebook. The. End.

[imgabe]

You can borrow them and decrypt and copy them the same way you do with DRMed e-books you buy.