I'm not sure if this should go in the Calibre or Kobo (plugin) forum... sorry.
I'm trying to figure out something weird. Here's the situation:
- On my Kobo Glo, I have both kepubs directly bought from Kobo, synced straight to my device from Kobo (I'll call them kepubs); and sideloaded epubs that I send to my device with Kobo using the KoboUtilities plugin to make kepubs out of them (I'll call them 'epubs' to make things less confusing).
- I have downloaded all kepubs to the device (from my Kobo account).
- In Calibre, I have free epubs, epubs bought from several different locations, and epub versions of all the books I bought/got for free from Kobo (either acsm downloaded from Kobo and epub moved into Calibre after downloading through ADE; or DRM-free epubs downloaded and imported into Calibre).
Here's the 'weird':
When connecting my device to Calibre,
some epub versions of Kobo books are recognised as "on the device" while not being sideloaded (i.e. the kepub is on the device through my Kobo account), and
some epub versions of Kobo books are
not recognised as "on the device" even if the kepub is on the device and author and title (and other details) of epub and kepub are identical. (And yes I checked the device directory to make sure that any books being recognised weren't accidentally also sideloaded.)
In my ideal world Calibre would recognise all the kepubs on the device as the same books as the corresponding epubs in the Calibre library, so I know I have the book and I don't have to sideload it. So I'm trying to figure out what makes Calibre recognise a book... I've compared books that are and aren't recognised but I can't figure it out. Both DRM and DRM-free books can be/not be recognised.
Some examples (see screenshot as well):
- The (bought) Tawny Man Trilogy is not recognised, but it has very ugly titles that I corrected in the Calibre library. So I re-downloaded the Tawny Man Trilogy from Kobo and re-imported it into Calibre to see if the books weren't recognised because I'd corrected the really ugly titles... but even with the original ugly Kobo titles they're not recognised.
- I have put two identical epubs ('Emma'; free) in my Calibre library: one downloaded from the Kobo account that I have my device sync to (this one is not recognised; though I did add a cover image to the epub), and one downloaded from a different Kobo account (this one is recognised).
- 'Bleak House' (free) kepub is recognised as identical to the DRM-free epub in Calibre library, downloaded from the same Kobo account I sync my device to. I added a cover image to this epub too...
- 'The Help' (bought) is also recognised as identical to the epub with DRM in Calibre library.
What's going on? Is there a magic field that I have to make sure is set to a certain something for my ideal world to come into existence?