hi @eschwartz
thanks a lot for your precious help and your detailed explanation.. but it seems I lost a few steps.. I never wroted a program like that and I never used it, so I don't know where it should be placed!!

I tried to create a custom column and then used {#custom_column} in device configuration send to option; I also tried to create a template function from Calibre options (the very last button on the Options GUI, sorry don't know in English how it is called); I also tried to paste this code directly into Send to device field option.. nothing, all I have is a file called something like
Code:
prefix_if_series = strcat( field('series'),' - (', field('publisher'), ')/[', field('series_index'), '] - '
So, where and how should I place this code, please?
Oh and BTW, it is possible to use
instead of series_index into this same code you wrote for me?
Thanks a lot for your help once again!