Multiple Publisher Imprints under single ISBN

[Bobby]

Just wanted to double check, but when there are multiple publisher imprint versions of a book that share an ISBN, that would be handled in the same manner as an alternate cover edition, right? As an example, many of the Terry Pratchett Discworld titles were published in the U.S. first by HarperPrism, and later by HarperTorch, under the same ISBN.

[rivka, Former Moderator]

Do they have different covers? Different page counts? If so, then yeah, alternate (cover) editions. If no, why not simply list the publisher as Harper and leave it as the single edition?

[Bobby]

Thanks. Most of them do have different covers as well, so I'll set them up as alternate cover editions.