[Koosr1946]

Originally Posted by Comfy.n

Not sure I understand the OP intent, but it reminds me what @chaley implemented here:

https://www.mobileread.com/forums/sh...0&postcount=19

To use it, make a stored template named whatever you want -- I use "get_one_book_per_field_value".

BTW chaley has a great gift of simplifying instructions. For beginners, I would add this: to make a stored template, you need to open Preferences -> Template Functions.

After creating the stored template, paste this into calibre's search box then run the search:

template:"""program: get_one_book_per_field_value('authors')#@#:b:yes"""

(then create the catalog as Sirtel instructed)

Thanks for your answer but it is to difficult for a 80 years old man