[rosalita]

Whew, this got really long, so apologies in advance and thanks to anyone who reads all the way to the end:

I've owned a Kobo e-reader since 2011 and currently own a GloHD and a Forma. I acquired the majority of my books from Kobo, and until now I've downloaded them from the device or through sync shortly after purchasing. The rest have been sideloaded using Calibre, and that always works smoothly.

Now that I've got a new iMac and can use the current version of Calibre, I've been more focused about making sure all of my ebooks are in Calibre, if only as a backup in case they disappear from the Kindle or Kobo storefronts (this has happened to a couple of books for me, though nothing I paid money for). But the other reason I'd like to exclusively use Calibre to move books on and off my Kobos is the superior series handling.

So ... I downloaded every one of my 500+ books from my Kobo account, and imported them into Calibre. I set the series information as appropriate, and transferred a subset back to my Kobo. Everything worked beautifully, EXCEPT I still have multiple listings for the same series with slightly different names (this happens with Kobo-purchased books because they are not consistent in how they name series, or perhaps because books are coming from different publishers who have different naming conventions for the same series).

I am guessing I need to wipe off everything that was downloaded from Kobo in order to start with a clean slate and then only load books from Calibre. If so, what's the best way to do that? And how do I keep Kobo from automatically downloading new purchases? I don't want to turn off wifi because I use Overdrive on my Forma.

Thanks for whatever advice you can give me!