(view spoiler)[The shocking revelation about Day in the second book led me to believe he's going to die in the end. I was emotionally prepared. Whatever's gonna happen, I thought I could handle. NOT. Damn. 
 Day may have survived (yey) but the whole ending still had me crying, what with all the amnesia and June trying to let go because of guilt, and they met again after ten years and again tears rolled down my cheeks because I realized I missed them. I was a mess. (hide spoiler)] 
 I won't say this is a favorite but I gotta commend Marie Lu for her skills at developing her characters as well as not failing to give the readers the suspense of action and element of anticipating the worst all throughout the series.