Okay, so it took me a while to care at all about this book. There are certain aspects of the book I really enjoyed, but there are other aspects that made me want to hurl it out of the window. 
 Let us discuss world building... 
 Oh, there are Scires, Seers, Auds, and a friggin' Aether? I wish I knew what any of those words meant before the book was almost over. Although the world Rossi has created is interesting, there was little to no explanation of anything. Several concepts throughout the novel were mentioned at least three times before I understood what they were. Once I had a better grasp of the world I finally became more invested in the story. 
 Furthermore,can we please talk about the scene where Aria starts her period? Oh, you don't remember that part? Let me help you. 
 Perry thinks it smells like violets. VIOLETS, PEOPLE. I have no words for this. Aria is so fantastically wonderful that her "first blood" smells like violets. *FACEPALM* 
 Now, all complaints aside...I did actually enjoy Under the Never Sky after I trudged through the first half. The romance between Perry and Aria was probably my favorite part. I have a serious love of love/hate relationships and Rossi definitely delivered on this front. It was a slow build and when it finally happened I was cheering. The development of their relationship as well their individual characters was really well done and added an important element to the story. Aria grew into such a strong and amazing character that I can't wait to find out more about her in the rest of the series. 
 Also, I'm really interested to see if the Still Blue actually exists. Ooooh and I hope we learn more about Aria's father and Perry's sister. Although I had a few issues with this novel in the beginning, it is well worth the read. And now I must know how their story ends!