If you initially liked Chaol in the first couple books, and then started to dislike him vehemently, this book will restore your Chaol-faith. 
 Now for everyone else: 
 Yrene is a badass. 
 Nesryn finally finds her role/place. 
 And all the new characters are vivid and will draw you in. 
 This book has SO MUCH HUGE INFO. SO MUCH. And the whole time I'm just like "OMG AELIN & CO ARE GOING TO FREAK OUT WHEN THEY HEAR ALL THIS." 
 Now for some spoilery thoughts: 
 (view spoiler)[ 1. Chaol and Nesryn are officially the MVPs of this war. 
 2. AELIN HASN'T JUST BEEN KIDNAPPED BY A FAE QUEEN BUT BY THE VALG QUEEN OMG ROWAN GET YOUR ASS TO HER NOW. 
 3. When Aelin is back, I can't wait for her to meet Hasar. They're going to give each other a run for their money. I'm not sure the world could handle Aelin, Hasar, Ansel, and Manon all in the same place at the same time. That is going to be a LOT of strong females in one spot. 
 4. Yrene is amazing. I am SO happy that she's grown into such a strong person. She's smart, sassy, capable, and no nonsense. I adore her beyond words. 
 5. NESRYN FINALLY GETS SOME HAPPINESS. I knew her and Chaol weren't going to be an endgame. There was too much baggage there. Nesryn needed someone who understands her secret heart and Sartaq is absolutely perfect for her. Also, she's now going to ride a ruk which I am PUMPED about. Give me all of the badass magical animals. 
 6. That last Fireheart chapter was a damn low-blow. We get this happy and hopeful ending and then that. Man. You're killin' me Maas. (hide spoiler)]