I was incredibly disheartened by how little I was interested in the first two thirds of this book. I couldn't find it in me to care what was happening to anyone in the story at all. I think there was too much going on, the story was getting pulled in too many directions, and the stakes felt too *constantly* high.
Then I hit the avalanche in the last couple hundred pages and I was absolutely hooked. I feel that the final part of Onyx Storm redeemed a lot of the struggles of Iron Flame and the beginning of this book for me, and I really think that Yarros wrote a stellar climax and resolution, with a believable cliffhanger. She's got me ready for more in the Empyrean, which I wasn't sure I would be when I started reading.