Combine books with no authors (details inside)

[Baffi]

I just rescued this cookbook and combined it with another existing German edition. It doesn't have an author, so I chose the editor of the German edition.

The original title is The Essential Pasta Cookbook, and the search gave me 4 results. All of them seem to be the same book, but with different names in the author/role field - which makes them non-combinable. What do I do in such a case?

[Sandra]

Sorry, Darciana, I checked 3 of the 4 cookbooks you listed and they are all different books, just with the same name. WorldCat also considers them different books. No combining required.