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Old 08-17-2019, 07:02 PM   #15
j.p.s
Grand Sorcerer
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Quote:
Originally Posted by lumpynose View Post
I'm guessing that Project Gutenberg makes their kindle books without compression; the difference in sizes is noticeable there. Presumably theirs are dual MOBI since they don't offer AZW3 downloads.
Quote:
Originally Posted by DuckieTigger View Post
I would think for compatibility it would be old mobi, not dual.
There's no need to guess or think
Code:
kindleunpack -s
reveals all.

My turn to be too lazy to check. I predict that even if newer files are dual MOBI, those that predate KF8 have not been updated to dual MOBI.
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