I exported as catalog a set of photos from a trip along with a book I had been working on so that I could work on them with a different computer while on a trip. I completed the book with the exported folder, and also edited some of the pics in this new catalog. I would like to now reimport the photos and book into the original catalog BUT the original files and book are still in that catalog, but are outdated because of the changes to the book and edits to many of the pics. Is there any way to handle this without screwing up lightroom? I am a proficient user but this one has me stumped.
First, make a backup of your main catalog before you try to merge your edits back into it.
After that, you should be able to open your main catalog and do an "import from catalog" to merge your edits back in.