title_body: What rights do I have to eBooks I purchase in the U.S.A. as a U.S. citizen?
upvoted_answer: Ebooks are protected by the Digital Milenium Copyright Act (DMCA), so you are only legally able to do what the DRM allows. Most of it depends upon the company who sells the ebook, and the publisher.
  
  
  If you are allowed to sign on to multiple readers with the same account.
  As long as the terms of whoever the account is with allow you to share accounts.
  Generally, no, because it would require stripping DRM.
  It depends on the company -- Amazon, for example, only allows nontransferable accounts.
  
  
  There is one exception: if you are legally unable to read books (blind), you can remove the DRM if it prevents screen reader use.
  
  NOTICE: I am not a DMCA expert, nor a legal consultant. I found this information through internet research, so make sure to confirm it.