If you're looking for comic books or collectibles then go to Crossover Comics. It's located at Av. Gral Paz 174 Local 5. http://www.crossover-comic.com.ar/
Paseo de las Flores (Path of the Flowers) is the entrance to a vast labyrinth of strip malls. You can find just about anything here, including restaurants, McDonalds, bookstores, DVD stores, clothing stores and more.
As long as you're walking around you might as well enjoy some of the beautiful architecture in Cordoba.
You have several places to choose from when doing groceries. There are mom and pop convenience stores in every neighborhood, but if you need more variety, you can visit some amazing supermarkets, like Vea, Libertad, Carrefour, Disco, and of course, Wal-Mart. Here's an interior look at some of the supermarkets in Cordoba.