The writing style is unique. Some will admire it but others will struggle following dialogue not separated by quotation marks, perspective that jumps without headings that indicate it will, and understanding terrible grammar and spelling that is intentionally faulty to develop setting and character.
The protagonist is a tough, sometimes selfish and cold survivor who is thrust into the role of leadership. She may appeal to fans of Katniss Everdeen. Her tactics to tear apart the enemy establishment are both intelligent and sloppy. She inspires the people to do what needs to be done, at great cost.
This is a dystopian adventure drama with a touch of romance. It will pull at the heartstrings of fans of the series, and concludes in a satisfying manner. The book will make most sense, and be enjoyed more if the series is read in sequence.