Quote:
Originally Posted by cgsmom
I have heard several people mention Amazon deleteing sideloaded books. I have never had that happen. I leave my Kindles connected to wifi all the time and let them update whenever they want. However, I do use Send to Kindle to send my non-Amazon books to my Kindles so all my devices and apps will sync. Is that not the same as sideloading?
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The procedure that seems to work to trigger the deletion is you need to sideload books via USB that have an ASIN that matches an Amazon ebook. If you update metadata on calibre, that can happen very easily. Then you leave your Kindle disconnected from WiFi for an extended period (no one is exactly certain but 6 weeks worked for me). When you reconnect to WiFi, Amazon seems to scan your content library for any books with an EBOK cdetype and an ASIN. If their backend says that ebook is not in your content library, it will be removed. The logic behind doing this and the requirement for an extended offline period is not something that Amazon seems to want to talk about.
Sent to Kindle delivers the books to your device with a PDOC cdetype so this will not happen to those ebooks.