Hi Sarah, I'm just looking at this now and I didn't see how you had it before, but I love the zombie cards. I can see the challenge you have trying to promote them alongside your other work. When I click on the shop section and see them all together, they really knock my socks off. (yes, big zombie fan here).
I think the featured items look pretty good but I would second what a couple of other people suggested, rearranging the items in your shop so they are clumped together - maybe one row of zombies, one row of paintings, one row of your abstract ACEOS, and so on. Also, your banner seems to be part of the problem. It doesn't really echo your current work as much as it could, including the abstract stuff. I would suggest incorporating the zombies into a cityscape splashed with your abstract designs like graffiti.... Just a thought.