Take the All-Mart! - Road Trips, #1

Brothers. Cyborgs. Con-men. Idiots. Roaring into the post-apocalyptic Wasteland on the run from a jilted warlord queen in a mind-controlled Dodge Swinger, cyborg brothers Trip and Rudy take on a suicide mission, plunging headlong into a world-devouring, sentient department store swarming with nanomachine-infested zombies, to rescue the daughter of a king--all for the love of an orgy-loving cyber-nun.
And for the reward. Okay, mostly for the reward.