[drMerry]

I have a Library on my server at home.
I got a lot of books I'm willing to update metadata for.

This info is inside pictures in the book (ISBN from back cover, etc).

I would like to add this info but with a lot of books, it takes a lot of time. So I was thinking is it possible to copy some books to my laptop-lib, edit info (I spend a lot of time @ the train each day) and merge the metadata with my main-library?

I want to keep some file info (like creation-date and calibre id) so move files between libraries is no option.
The name and author will stay the same so the only thing I want to do is merge/replace the metadata of book a (on laptop) with metadata of b.
While some books are rather big (several 100's of MB's), Importing the info to the main-lib and merging afterwards would be no option either.

I myself was thinking of two possible ways:
1. Use an external program to find matching lines in the db and merge db's
2. get the metadata-file of the book and from laptop and move it to the right place in my calibre folder.
After that I need to read this info and write it into my calibre db (The current read file-metadata info would not work while it gets original info (like original title, etc))

Anyone any Idea on how to work this out?