[Qthemuse]

Originally Posted by Nate the great

http://www.microsoft.com/reader/info/tips/nolonger.MSPX

I looked it up, and I think that EBO is not an ebook file; it is some type of configuration file created by a copy of MSReader. Do you have MSReader, and was it open at the time?

I ran into the same problem yesterday. The .ebo file is in a separate file labeled "annotations" with the corresponding book in .lrf format in a completely different file. I was assuming that maybe it is footnotes that "go with" the corresponding book but I can't seem to load the .ebo file onto calibre to even begin how to figure out how to put it on my reader with the sister book to "use" these supposed annotations. Maybe I am thinking about this in the wrong way. I emailed the place I acquired the files from so hopefully I will get an answer soon. I'll post if/when I do.