Combining an omnibus with the single editions?

[JG (Introverted Reader)]

No, omnibus editions don't get combined with either of the individual works. Here's what the librarian manual has to say:

don't combine:

* 2-in-1 books or boxed sets that include the given book.

Thanks for asking first! :-)

[JG (Introverted Reader)]

There's a lot in there to try to remember. It's easy to forget something. :-)