I just realized that even though I read this book last September, I have not reviewed it earlier. So, here is my review of this awesome book - as a way to cope with the waiting period for Queen of Shadows. 
 If I loved this series before, I am obsessed about it after reading this third installment. The story seems to be getting better with every book... 
 In Heir of Fire, there are a lot of things going on. We are given the whole picture through multiple points of view. Of course, the voice that rings the loudest of them all is that of Celaena Sardothien. She has left Dorian and Chaol behind on a mission. While her latest mission brings her more friends and allies, she finds herself on a path of self-discovery. Her life in Adarlan had suppressed her Fae form and as such she has little or no control over it. Rowan is bound by blood oath to Maeve and so when she orders him to train Celaena, Rowan does his best. As Celaena and Rowan grow closer, a bond forms between them. I know a lot of people are shipping Celaena and Rowan, but I find that their relationship to be very platonic. While they form a great team when they work together, I just don't see romance happening between them. We also get a close up look at the Ironteeth witches! What can I say about Manon? At this stage, I am a bit confused about her character. She is strong and ruthless, yet at times I feel that she is 'better' than the rest of them. I love her storyline including Abraxos... I could literally feel the connection between the two. 
 Dorian has developed a lot over the time. My first impression of him was that he is a wimp and while I still feel that at times, I have mostly grown to love him. The way he handles the truth about Celaena was much better than what I expected. And my God, I am really scared for him with what happened at the end of HoF. Though somehow my heart tells me that he will come out of the situation in the end. Chaol on the other hand is taking the right opposite road. I liked him at the beginning, but I am slowly growing to dislike him. I realize that at the end of the day, his loyalty lies with Dorian, yet his indecisiveness is just not fair to Celaena. 
 And Aedion! OMG!! I was saving the best for the last. I am in love and I have a new book boyfriend! I admit that the plot of this particular book did not give much exposure to Aedion and we see him fight only once... but his reputation tells me he is no less than Celaena. I admire his loyalty to his queen so much. I cannot wait to see and read more about Aedion in the remaining books! I hope he gets a role that suits the buildup that the author has given him. 
 I love this new world that Sarah J Maas has built for us. And the fact is that with each book, things seem to only grow and get better. The strength of the novel lies in its very strong characters and its beautiful world. There are instances where the narrative feels a bit repetitive, but it happens only once or twice and is pretty ignorable. 
 I need to get my hands on Queen of Shadows... NOW!