This is by far the most emotional of the books in the Throne of Glass series, so get your tissues ready. It’s also the book that opens up the story for the grander fight against the evil king, without making many steps in that direction.
A lot of Heir of Fire is spent working through Celaena’s internal conflict. She has to face her past in order to move forward. It’s not the most riveting thing to read, but it’s tempered by her developing magical skills and the hunt for a murderer of demi-fae.
Heir of Fire also introduces the Ironteeth witch Manon and the wyverns. As readers get the answer to what’s happening in the mountains (partially), Manon provides a welcome bit of action. I instantly loved the wyvern Abraxos, but unfortunately nothing comes of their storyline in this book.
Will I keep reading? Of course. But I’m an impatient reader. I hope to find much more plot movement in book four, because, though I loved the world-building in Heir of Fire, it did put my patience to the test.