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Old 09-07-2025, 06:49 AM   #77
KrystalMass
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KrystalMass began at the beginning.
 
Posts: 6
Karma: 10
Join Date: Sep 2025
Device: Kindle Paperwhite 11th Gen
Quote:
Originally Posted by Rellwood View Post
Apparently, redditors have been complaining about sideloading books running into some weird "ASIN" problem with Amazon requiring sideloaded books to pass an ASIN "sniff test" - and books that don't match up are unable to open.

Apparently, they want you to use their send to kindle feature.
This is happening on Kindle 5.18.4.0.1. Versions 5.18.3 and earlier don't have this problem. There is a workaround to open your sideloaded books by clicking on the three dots menu (or long press on a book cover thumbnail) and choose "Go To." In my case, it only seems to happen on books sideloaded after the update to 5.18.4.0.1. But that is perhaps because I had already opened the books I had previously sideloaded before my kindle updated to the latest.

It should be noted that Amazon's customer support specifically told me to convert my books to epub with Calibre and then use the Send To Kindle. Another representative told me to reset my Kindle. I may try resetting it. But this update to the kindle firmware is definitely breaking sideloading. I'm going to try to manually copying a book and cover to the Documents/Thumbnails folder on my kindle and see what happens.
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