The link below is to an article that takes a look at how to remove old Kindles and Kindle Apps from your account.
The links below are to articles that report on the ability to remove DRM from Kindle’s KFX format.
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The link below is to an article that reports on Amazon’s plans to remove books under 2500 words in length from the Kindle store.
The link below is to an article that looks at how to get rid of the musty smell from old books.