Quote:
Originally Posted by eschwartz
... But this won't work with e.g. fanfiction, converted documents, etc.
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Yup. The book has to be available on Amazon.
Incidentally, you can insert any ASIN you like, it doesn't have to match the title. The Kindle will pull whatever cover matches the ASIN, even if it's a totally different book
If a book has multiple editions, each with their own ASIN, you can switch covers by switching ASINs. Goodreads is a good source for ASINs for editions that are no longer available for sale and therefore no longer searchable on Amazon's site. Visiting different Amazon sites by country will also give you different ASINs, allowing you to pick between, say, UK, Canada, and US covers, if they're different.
But still, as you say, it's silly -- nay, RIDICULOUS! -- that Amazon pulls thumbnails from their server rather than simply extracting them from the ebook. Seems like a whole lot of extra, unnecessary effort for everyone, including them.