@dwanthny :
It is the standard ISBN column, if you aren't seeing it, you may not have it enabled, or it could be off the right edge of your screen.
@theducks
Well, since I just downloaded and installed Calibre, I'm assuming I have the most recent version (as of three days ago), so I am guessing that the isbn itself is not valid.... I've only found the problem with e-book exclusive titles.
An example is 'Book of Days' by Sara Reinke, ISBN 1-55404-295-X according to the book itself.
EDIT: Well, that book is no longer an issue, dug around and found an ISBN-13 for it, for some reason it was nowhere to be found in the metadata search. I've a theory now that possibly Calibre doesn't like the X ending and automatically chooses the ISBN 13 in those cases... when it is not able to find it is when i get the problem. On a side not, I feel ripped off.. I found the book for over a dollar less than I paid during my search for the ISBN
