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About the calibre golden rule, "Calibre has a golden rule you should follow - don't add, change or remove anything from the Library/Author/Book Title folders by any means other than the calibre program."
One good reason to follow that rule is that calibre use "lazy" updates of the books. You can change metadata for books in the calibre GUI, but calibre doesn't store those changes in the books, just in the database and the filenames. When you send books to your device or save a book to disc, then the metadata in the new copy of the book is updated. But the metadata in the contents of the book in the library is still the original metadata.
This is what makes calibre so fast. Calibre doesn't have to update a book every time you make a small change in the metadata, instead the changes are stored in the database. Also it helps keep the original metadata unchanged and safe in the books, that can be very important for some.
It is possible to "force" calibre to update metadata stored inside the books in the library. Then all updates and changes are applied at once.
Last edited by Adoby; 06-25-2014 at 02:39 AM.
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