Uhm, I'm not really sure what I just read. 
 I held off reading Insurgent for the past few years because I wasn't too impressed with the first book, Divergent. Let's just say I'm less than impressed right now... 
 The entire novel was building up towards the possibility of all the factions waging war against Erudite and discovering the "very important secret" that led to the destruction of the Abnegation faction... but the story's pace was slow and the ending only left me feeling confused and dissatisfied. 
 I'm also not too happy with the way Tris' character has developed. I seem to recall that Divergent had a very strong, brave and smart heroine. In Insurgent Tris turned into a complete emotional mess. 
 I think a good 75% of the book was about Tris suffering from post-traumatic stress disorder and her lovey-dovey feelings towards Tobias.