Quote Originally Posted by dra600n View Post
What's the difference between Ebook and EPUB? Is it just the format and which e-reader/software can view the document/book?
EBook just means it's in a format for reading on an ebook, like the Nook or Kindle.
In the past, that meant all of these:
https://en.wikipedia.org/wiki/Compar...e-book_formats

These days, it pretty much means PDF, EPUB and CBR, all of which most readers can deal with easily.