Couldn't combine these books

[Gokhan]

I couldn't combine Agatha Christie's Black Coffee (Hercule Poirot Mysteries and it's Turkish version Acı Kahve. When i go to combine section, there is two pages and i can't choose both books.

[Cait]

Got it. (You need to temporarily edit the titles so that they can be filtered together, combine the editions, then reset the title.)