Kira is seeking a solution to RM and the expiration date, and Sam is supporting her in her endeavors even though she seems to be making lots of mistakes. Marcus is desperately trying to keep the peace back at East Meadow while the partials close in on what's left of the humans. There's a lot of tension as well as intricate plot and character development here. We also get to see a lot more of the post-apocalyptic world, and we start to find out what caused the "break" and who's left alive who might have some of the answers. Of course, the answers so far are all morally ambiguous so the book raises some very interesting questions about when it's justified to sacrifice some lives to save many.
While this is a post-apocalyptic action sci-fi series, the writing style is more quiet and thoughtful than some other series in a similar vein and I do enjoy it, although sometimes I feel that the pace lags or that the information being conveyed by the characters is a little repetitive. I have listened to this series so far on audiobook and the narrator (Julia Whelan) is wonderful, really getting the sense of the different characters' voices across extremely effectively. This is no mean feat considering it's not always easy for a woman to make her voice come across in the character of a bunch of military men. So I highly recommend the audio version to those who like audiobooks. I'm eagerly awaiting the next installment of this series.