Insurgent in my opinion is AMAZING. Suspenseful and action packed it resembles nothing of a middle book, meaning it isn't just filler. It has it's own twists and turns and doesn't rely on referencing the first book aside from some obvious need to. Of course I'm not saying it doesn't require reading the first book, you definitely need to read Divergent in order to know what's going on.
The book starts off right where Divergent ends; with the world, as Tris and Tobias know it, in chaos. Factions are split and no one knows who to trust, anyone could be a spy. Throughout the book there are multiple people who go from friend to foe and vice versa with some people, who we never would have expected, turning up. There are also more deaths (naturally) and strained relationships. The book leads up to an intense ending that reveals something BIG, I mean HUGE. It really answers my question of why is the story set ONLY in Chicago?.
Tobias and Tris' relationship is on the rocks throughout the book, which made me really sad. I feel like they are stronger when they work together but they spent too much time keeping secrets from each other to be any good as a team. It really isn't until the end that things sort themselves out again but by then it's the end.
I'm really excited to start Allegiant here in a few but it's been out for a little while now and the feedback I've been reading has been not so good. Not really because of the writing but more what happens. I have my own idea of how I want to end and I love this series so much that I am really scared about how Veronica may have ended the story. I don't think I've ever been so excited but so NERVOUS to read a book before. Because to be truthful, The Hunger Games trilogy was almost ruined for me when a certain someone died, when that happened I was all "WHAT WAS THE POINT OF EVERYTHING?!" So yeah, I'm a little (a lot) nervous.