Long thread. Is this an accurate summary of the issue?
- Amazon is removing books sideloaded via USB as EBOKs if they have an ASIN that Amazon thinks doesn't belong on the device.
- The deletion is triggered by (certain) WiFi usage.
- Fake ASINs won't fix this because they won't be in the "belongs there" list.
- Books missing ASINs in calibre get fake ASINs when sideloaded by calibre.
- The only fixes are very careful (or no) WiFi usage or loading them as PDOCs.
- AZW3 is always as created EBOK in calibre conversions. Only MOBI and KFX can be PDOC.