I was skeptical about the fluidity and realism of the dialogue at first, but then the characters started to take shape. I settled into the flow, and the story — all dialogue — kept my attention throughout. While I think this apocalyptic/post-apocalypitc kind of story is pretty prevalent, especially in YA fiction today (e.g., Hunger Games, Divergent, et al.), this had a certain sci-fi twist that was appealing in a different manner. Two characters discussing morality face-to-face is always a nice hook for any reader. Cool story!