Quote:
Originally Posted by just_jeepin
I just assumed it would only add that IF there were two books titled the same.
|
No, it does that regardless. I'm up to the 16,000's now. You probably aren't using them, but calibre has command line tools that use those numbers, so it's convenient to see them there. The numbers are the primary reference id# that Calibre uses to refer to ebooks internally.