What is the best way to collect all libraries together?

[abrogard]

I have many libraries spread across many disks.

What's the best way to collect them all together into one library?

p.s. the same book will appear in a number of libraries.

p.p.s. and another question: I've never really understood that bit about 'assume all ebook in a single folder are the same book in different formats'. I always say no.

When would it apply?

[theducks]

Originally Posted by abrogard

I have many libraries spread across many disks.

What's the best way to collect them all together into one library?

p.s. the same book will appear in a number of libraries.

p.p.s. and another question: I've never really understood that bit about 'assume all ebook in a single folder are the same book in different formats'. I always say no.

When would it apply?

If they are Calibre Libraries, Use Copy To Library to Move (merge)

This is NOT a Add from the File System. It uses the Calibre data to select and copy FILES and the DB entry. IT is very fast as the books need not be opened or parsed.

Calibre must be aware of both Libraries (On the switch Library List)
Simply go to the SOURCE LIBRARY: Select the books: Right-click Copy to Library (option):<target>
Switch back when done or to another SOURCE and repeat the steps

Preferences: Adding books: Adding Options (a tab) has options when dups are found

Your question assume... say you have both EPUB and Mobi (that is one book, with more than one format. This is also the structure of a single title in Calibre.