A glitch can remove books from the Kindle, showing an "Item Not Available" message, but no panic needed. Delete the offending file, reboot the Kindle by long pressing the sleep/wake button, and then ...
If the e-book app on your phone or tablet is overflowing and full of outdated files, use these tools to tidy it up. By J. D. Biersdorfer J.D. Biersdorfer has been reading e-books on gadgets since 2005 ...