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Old 08-17-2021, 02:10 AM   #121
AlanHK
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Quote:
Originally Posted by sadievan View Post
Books that had covers were listed as: thumbnail_(Amazon’s ASIN#=Bxxx)_EBOK_portrait.jpg
Books that did not have covers were listed as: thumbnail_(Bunch of numbers and letters)_EBOK_portrait.jpg
When using the Kindlegen plugin for Sigil, you set the ASIN in the OPF of the epub:

for epub2: <dc:identifier opf:scheme="AMAZON">X</dc:identifier>

for epub3: <dc:identifier>urn:AMAZON:X</dc:identifier>

Then when the plugin creates the thumbnail, it makes it:
thumbnail_X_EBOK_portrait.jpg

"X" doesn't need to be the actual Amazon ASIN. Whatever you use becomes the ID that the Kindle uses for that book, and its cover. So it does need to be unique.
I put an abbreviated form of the title, so I can easily see if it matches:
<dc:identifier opf:scheme="AMAZON">MOBYDICK</dc:identifier>
If there is no ASIN in the epub OPF, then one is created on the fly when the AZW or mobi is created, different each time, thus the random names you see.

If you make your own pseudo ASIN, the Kindle won't substitute a cover from Amazon.
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