These two volumes are presently cataloged as different editions of the same volume. This should be undone. The second original volume (out of three) is split between these two volumes. Thus they should be numbered as (#1, #2, part 1 of 2) and (#2, part 2 of 2, #3). I see there is precedence for this order at the series Dune Chronicles.
Then, finally, there's a one-volume edition (#1-3)
Originally published in three volumes:
1. https://www.goodreads.com/book/show/3...
2. https://www.goodreads.com/book/show/3...
3. https://www.goodreads.com/book/show/3...
Then there's the two-volume edition:
1. https://www.goodreads.com/book/show/3...
2. https://www.goodreads.com/book/show/3...
These two volumes are presently cataloged as different editions of the same volume. This should be undone. The second original volume (out of three) is split between these two volumes. Thus they should be numbered as (#1, #2, part 1 of 2) and (#2, part 2 of 2, #3). I see there is precedence for this order at the series Dune Chronicles.
Then, finally, there's a one-volume edition (#1-3)
https://www.goodreads.com/book/show/3...