I got it. Thanks.
The debug log shows that you have "read" several different books over the last 2 weeks, and that CC started the Nook app each time. Did all the others work? Is it only the last book I see in the log that you cannot read (....Fall...)? If so, then I suspect that the book in question is damaged internally somehow to the point where the Nook app cannot handle it. The fact that you can read it with the calibre viewer is encouraging. Calibre is *very* forgiving of bizarre stuff in an ebook.
If the last book is the only book that up-to-now isn't readable then I suggest use calibre to try to fix it. Start calibre, select the book, then do an epub->epub conversion. Click the Convert button and be sure that epub is in the two boxes at the top. Calibre will clean up the book. After it finished the conversion, connect your Nook and send the book again. If all went well it will now be readable.
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