Goodreads Librarians Group discussion

I have a question reagarding these books:
http://www.goodreads.com/book/show/10...

http://www.goodreads.com/book/show/66...

It's the same book but with 2 different editions. Should you merge them or just let them be?

Since the newer editions has been merged in this edition:

http://www.goodreads.com/book/show/61...

and this:
http://www.goodreads.com/book/show/14...

They should all be combined since they are editions of one book.

They all have appropriate ISBNs and should not be merged. (We use the term merge to delete an edition and move any ratings and reviews to another edition.)

done

Thanks for the explanation and for combining them.