Overall, this is a good story that picks up the plot from the first book and moves it forward, if in mostly predictable ways. Unfortunately, the author leaves the main protagonist from the first book on the sidelines for the greater part of this book and we follow around more of the secondary characters, or many newly introduced characters, about whom it's hard to care all that much. Like the first book, you also have to keep yourself from picking apart the plot holes, especially those created by illogical use of technology or, more accurately, non-use when many things could have been done to protect humans by having AIs take all the risks.
What ruined it for me, however, was turning an 8-year old girl into a foul-mouthed, gun-toting survivalist type who thinks nothing of shooting a man in the head and has no apparent negative emotional reaction afterward. That was a bridge too far and, based on the synopsis for the next (3rd) book, it appears that (as a 13-yr old) she will feature prominently. So, I will be passing on the rest of this series.