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I have a large sideloaded library stored on my Kindles that I want to organize by the (genre) tag stored in Calibre. Since Amazon forces collections to be manually organized for sideloaded books, it's not feasible to do in my use case.

I have been using Calibre's catalog feature for my organization on the devices but it is cumbersome to maintain and use. What I would like to do instead is to use Calibre to add the genre tag to the name which Kindle displays on the device. Then I could use Kindle's search function to display books by genre.

How can I do this? Thanks for you help