1. no
2. if the there is no internal metadata
3. Look at the info dict
4. yes, though metadata i not always successsfully written to PDF files
5. no
6. if the title or the author are changed
7. set a send to device template that doesn't include title or author
8. collections.json. what's the problem with books that are part of multiple collections
9. not really, the send to device template uses metadata available in the calibre library. Before you send a file to the kindle it is not in any collection, since it hasn't been sent to the kindle yet
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