It's a good start, and a good concept, but needs to be fleshed out significantly. The attention to "group paying for food" is a neat addition you don't usually see in cookbooks.
Perhaps it might be better as a subscription service, with a recipe (in formats from index-card to full-page) prepared every month?
Some pictures of what the recipe is supposed to look like when it's done would be cool as well.
[2 of 5 Stars!]