title_body: What is the correct term for eBook? According to Wikipedia there are several variations of the term; e-book, eBook, e-Book, ebook, digital book, or even e-edition.  Is there anyone that is most widely accepted or used?
upvoted_answer: Donald Knuth, inventor of TeX, writes on a related word:
  
  A note on email versus e-mail
  Newly coined nonce words of English are often spelled with a hyphen, but the hyphen disappears when the words become widely used. For example, people used to write &quot;non-zero&quot; and &quot;soft-ware&quot; instead of &quot;nonzero&quot; and &quot;software&quot;; the same trend has occurred for hundreds of other words. Thus it's high time for everybody to stop using the archaic spelling &quot;e-mail'&quot;. Think of how many keystrokes you will save in your lifetime if you stop now! The form &quot;email&quot; has been well established in England for several years, so I am amazed to see Americans being overly conservative in this regard. (Of course, &quot;email&quot; has been a familiar word in France, Germany, and the Netherlands much longer than in England—but for an entirely different reason.)
  
  Extending the principle, there is no question that &quot;e-book&quot; (and also &quot;Ebook&quot; and &quot;eBook&quot;) will go out of style shortly.  The only real question is if &quot;ebook&quot; will stick or if we will end up on just &quot;book&quot;.  It's instructive to note that if someone tells me to mail them a document, I will reach for my computer and not for a paper envelope.