I recommend Under the Never Sky. 
 ***** 
 The lack of explanation for the dystopian element made me think of Legend by Marie Lu. I didn't mind, though. I hope to see more world building in the next books. First half was frustrating (with Aria so high-and-mighty and Perry so irrationally jealous towards his brother, Vale); Second half was more to my liking. 
 Under the Never Sky reminded me of romance novels I used to read before. Take Perry, for instance. He could have passed for a Highlander, you know, those Scot warriors who are big, bad, scarred yet beautiful? Same with the Death Shop setting: (1) You defend the land you have, (2) You trade goods (food, weapons) by marrying off the women to another tribe, (3) The need to defeat and slay the chief of a tribe in order to become the chief (here they are called Blood Lord). 
 Aria is so whiny, and rude, too. I want the cannibals to end her miserable life right then and there. My feelings changed when she started practicing knife-wielding with Roar (I like this guy! I want more of him). Still not enough strength to survive in a dystopian world, but she might, in the next installments. Perry is not my typical Prince Charming. and yet he grew on me. The gruff and savage exterior is hard to break, but it is breakable. I love how his character transformed in the second half. Who doesn't admire a guy who handles a bow and arrow with lethal accuracy, right? He's also handy with knives. Rougish. Blond dreadlocks. Dangerously violent when needed but loyal to a fault to his family. My kind of guy! 
 The brutal encounter between Perry and the cannibals are so fun! Add to that the inevitable showdown between Vale and Perry for the title of Blood Lord of the Tides. Yipee! These gory fight scenes definitely made reading this worthwhile. :D 
 The romance made me squeal a little. :) It was not instant, but it was.. just right, i guess. Warm and feel-good romance. Maybe i'm feeling sad lately, because that ending made me smile so wide. Hee! 
 The Pods where the dwellers live might need a little more exposure in the coming books. and the Aether - i really hope Rossi explains more of that, too. But the Death Shop, I love the concept. All the more with the Auds, Scire, and other Marked people. 
 Several holes in the plot (believe me, you'll notice it too), but i enjoyed the last part. If ever you'll read Under the Never Sky, make sure you have a bag of patience beside you.