[crullx]

Originally Posted by JimmXinu

I could add an option for that. But what would the series number be set to? Sames as the first book? (If not specified, Calibre will automatically assign the next unused number in the series.)

Then the question is, if I'm modifying standard column behavior, what other standard columns changes should I add?

Standard columns are handled in these specific ways:

Spoiler:

• Title: If all books in same Series, Title = Series, else Title from first source book
• Authors: List of all Authors from all source books
• Publisher: If all books have same Publisher, Publisher is set
• Tags: List of all Tags from all source books
• Languages: List of all Languages from all source books
• Series: Empty
• Comments: Titles & Authors list, or optionally Titles & Authors + source Comments
• Cover: Cover from first source book

Anyone else have any opinions?

FYI, with the current PI, you could use a Series type custom column with a few extra steps at the start and finish of your 'hundreds' of merges. You could:

Spoiler:

• Add a Series type custom column(example #text_series)
• Use Calibre's Edit Metadata Search & Replace to copy standard Series to #text_series - See attached
• In EpubMerge config, set #text_series to 'Take from first'
• Do hundreds of merges
• Use Calibre's Edit Metadata Search & Replace to copy #text_series to standard Series for the new merged books

The series number in my case should also be taken from the first book.
I don't merge different part of series. I make dual language ebooks. All my merged books are the same part of the series.
My mother tongue is Hungarian.
So if I have a series with 3 episodes, instead of 6 books (3 English and 3 Hungarian books), I merge them into 3 English/Hungarian dual language books. It's easier to deal with them and find them this way.
So I don't need any variables for the series numbers because I only merge the same episode of a series with different languages.