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Old 05-24-2022, 08:03 PM   #4
PeterT
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Posts: 13,587
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Join Date: Nov 2007
Location: Toronto
Device: Libra H2O, Libra Colour
Quote:
Originally Posted by compurandom View Post
It's easy in calibre to do any search. For example
Code:
!tags:mycollection
would show all the books not in mycollection.
Yes; but the O/P wanted to find books that are in NO collection.

Additionally if one uses multiple calibre columns as the source for collections then your approach would not work.
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