Question about series numbering

[Kadi]

I've looked all over for an answer but I can't seem to find one.

Can you have 2 books with the same number in a series?
For example: this book Mighty Morphin Power Rangers: Beyond the Grid Deluxe Edition is numbered as book 9-10 in a series
However, this entirely different book Mighty Morphin Power Rangers: Beyond the Grid is also book 9-10.

Can the second one listed above be added to the series as book 9-10 as well? Or can only one book be book 9-10?

[Scott]

They should be combined, but who is the main author of the book?

[Kadi]

Should they be combined? Because the first is a deluxe edition which collects extra stuff inside it and the second is not a deluxe edition.

[Scott]

Depends on the nature of the extra stuff.

[Kadi]

Mighty Morphin Power Rangers: Beyond the Grid Deluxe Edition collects issue #31-39 (aka vol 9&10) and Mighty Morphin Power Rangers Anniversary Special #1 (a special oversized issue)
Whereas
Mighty Morphin Power Rangers: Beyond the Grid collects just issue #31-39 (aka vol 9&10)

From my past experience with comic trades if the deluxe has extra content like this one does then it is kept separate from other editions that collect the same issues like the second one listed above is so it should not be combined. Which was why I was asking if 2 separate books can have the same numbering in a series.

[Scott]

Ok, if it has an extra issue, it probably shouldn't be combined. If it was just "supplemental" material it would be.

[Scott]

Added to series.

[Kadi]

Thanks for the clarification and help Scott!

In that case could you also add this book: Mighty Morphin Power Rangers: Shattered Grid to that same series as book 7-8?
(it has the same issue as the above one where it's not the deluxe edition which collects extra content but still collects vol 7&8)

[Scott]

done