I can't see them being connected.... I just reviewed a recipe from one edition but it didn't show up in the other edition and had to be added there as well. Maybe I misunderstand the connect function... I assumed it would mean avoiding duplicating reviews.
The connection system allows you to connect all editions of a cookbook, but it doesn't stop duplication of reviews. The reason is because recipes are sometimes tweaked from one edition of a cookbook to another, and I wanted to be sure that we captured that possibility (look at Joy of Cooking, for example).
As it's set up now, they system allows you to look at recipes from all editions of a cookbook, but it's a bit of an obscure step to do this. You have to click 'recipe reviews' and then on the list page that follows, select 'show results from all editions'.
I didn't want this on by default, as I thought it might confuse some people. However, perhaps there's a more clear way to do this?