I'm not aware of any legal issue around lending a book to someone else. Again, the publisher has gotten its money for one copy of the book. I'm also not aware of any legal issue around selling a used book, although publishers absolutely hate that. They'd love to constrain your rights so that, if you sell the book, you have to erase your memory of its content. In academia, at least, they address the issue by constantly releasing pointless new revisions of textbooks with problems rearranged.
Sounds like Napster all over again. In an effort to get around just putting out all the music for a fee, they invented a peer-to-peer sharing mechanism and claimed it was just like folks lending their CD's to their friends. That didn't fly with the courts either. https://en.wikipedia.org/wiki/A&M_Records,_Inc._v._Napster,_Inc.
I voted "absolutely not" for a host of reasons, which have been well explained by other members already.
If you are talking about books on numismatics this already exists on/in the Newman’s Numismatic Portal (did I spell that correctly?).
that happens when the key board does not keep up with my one finger typing and spell check and bill gates think they know what I want to say more than I do. Very annoying when I notice and fix it. New and improved - yeah right.
I donated all my hard copies to my local library to open a small numismatics section after my 2 me upgrade