Ok, let's be real--You already know if you want to read Onyx Storm. You're either on the Fourth Wing bandwagon or you're not. No one's coming to my review to decide  if they want to read this book. 
 
This review is just for me so I can remember what I did and did not like, and there will probably definitely be spoilers. 
In a nutshell, I'm here for the dragons. Andarna is my girl and Tairn is king. I literally laugh out loud at some of the things they say. I was heartbroken when Andarna left but that whole subplot was a little weak. Like I get how her breed of dragons are peaceful and they don't want to accept her because of the fighting and Violet's choices, BUT, the fact that she left only to come back at the last minute? Nah. 

I really liked the adventure and questing in this one. It was a lot fun visiting the other islands and decoding the secrets from the books. I like that we started getting more answers to Violet's childhood -- it seems her dad tried to dedicate her to one of the gods and I'm interested to see where that storyline goes. 

What I don't really get is the love for Xaden. Sure, he's written as physically attractive but in my opinion he's broody and boring and I feel like he doesn't have a personality. I just don't see the appeal. 
And because of that, I don't care about the romance. 
Also, I'm not here for the Xaden-venin subplot. Couldn't the rest of the story just be about defeating the venin without one of the main characters turning? Honestly, when that happened at the end of the second book I rolled my eyes and thought "of course he turned venin". It just feels like cheap way to stir up some drama and raise the stakes.