You can get a free download of the latest cookbook from Costco, Smart Cooking the Costco Way.
This is full of recipes submitted by various companies that have products in Costco stores.
I have found great recipes in these cookbooks in the past so it is worth looking at.
Head over here to get the free cookbook download from Costco.
And if you want to see prior cookbooks, still available to download just head over here and scroll down to Recipes: The Costco Way.