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					Originally Posted by  HarryT
					 
				 
				ePub is also a "binary format", Jon. Try to open an ePub file in "Notepad" and you won't get very far   .  
			
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 Not quite. ePub is just a renamed ZIP archive with, mostly, HTML & CSS files in it (plus a JPeG for the cover, usually, maybe an XML file or two, and a few miscellaneous files depending on where you got it from, like an iTunesMetadata.plist). Rename it to .zip instead of .epub and you can easily open it with a double-click to see the goodies inside.