This series is getting better and better! Seriously, it is. I didn't love it, but I really liked it, and I think it might be my favorite book in the series so far. 
 This book is massively epic, and we learn so much about Celaena and the world she lives in, and I couldn't believe everything that happened. Celaena has a lot in store for her in the book, and what she learns about her family going back to basically the dawn of time or whatever...I wasn't sure what to expect, but I did like what Maas did with that. Looking back, it was sort of predictable, but it wasn't something I thought about until I read that part. 
 It does seem like there's a possibility that Rowan is a love interest for Celaena, and I don't know if I care for them as a couple. Granted, it seems more like friendship than anything else, but it did seem like it might be a possibility. I'm actually fine with Celaena not being with anyone, because she has enough going on without adding in romance, even though it would eventually help her out with being queen. 
 Manon and the stuff with the covens seemed a little out place in this book. We got a little bit of it in Crown Of Midnight, and it makes me think that it was introduced because it's going to come up in the next book. It was a little bit interesting, but it didn't quite fit with the rest of the story, since it has no direct impact on what we see happening in this particular book. It was a little bit slow, which was odd considering how much actually happened in the book. And it seemed like it was too long at times. But still, it's pretty epic, and I'm actually really glad I don't have to wait for the next book. 
 I really liked Sorscha, and I wish we saw more of her. I know it's because we have the stuff with Celaena, Chaol and Aedion and with Dorian, and by default, we don't see much with her. But I was sad to see her go, if only because I really liked the glimpses we saw of her. 
 I felt for Aedion, a lot, and I don't know that I really like Rowan. I did like that he felt bad about how he treated Celaena, but...at first, I hated him, and even though I don't outright hate him, I am currently unsure how I feel about him as a character. 
 I also don't know what else to say about Heir Of Fire. I think I pretty much covered everything, so on with my rating! 
 My Rating: 4 stars. I really liked it, and we learn a lot but it was also slow and it dragged a little bit.