@
emmgee - what I and many others do for adding new books is something like the following
- import (add) books into a "New Books" library *
- do any necessary adjustments to basic metadata - ie Author, Title, ISBN and perhaps Series
- use the Find-Duplicates plugin->Find library duplicates feature to check for duplicates in the main library
- if I want to see details of what's in the main library I start calibre-server against the main library and access it via a browser.
- the books which are not duplicates I move to the main library, using Copy to Library (delete after copy).
- I resolve the duplicates either by
- removing the book from the New Books library,
- manually adding the format file (or replacing the existing format file) in the book in the main library - I do that by dragging the file out of the New Books book folder, and dropping it onto the relevant Book Details panel in the main library - calibre always does this as a copy. Then I remove the book from the New Books library
- At the end of the process I should have an empty New Books library
BR
*I normally do that either via Windows Send To, or by by dragging the format files from my file manager into the Book List.