Should these books be combined?

[R]

Original version: https://www.goodreads.com/book/show/2...

New version: https://www.goodreads.com/book/show/4...

[rivka, Librarian Moderator]

In general, we do combine revised editions with the originals. However, in this case it is literally twice the length of the original. That's more than just a revision, so I would leave them separate.