The main characters have all become much tougher by this fourth book in the series, which is always an exciting dynamic. They become both more cautious and more willing to take risks with their own lives because their battles are over the survival of the human race. The character of Lila's boyfriend/Clara's father, Raj, is a really strange and pathetic young man who just never made it to adulthood with a good sense of loyalty to family, when to break rules, and when to follow them. His character does help the story move in unexpected directions. Even though he's the guy you'd wish would vaporize for no good reason, lots of action happens to everyone else because of his screwed up sense of duty. My favorite character is Piper, young wife and stepmother to two teenagers. She starts out as very sweet and somewhat self-centered, and becomes the strongest member of the family, holding everything together. When she leaves the family bunker to take a bigger role in the riskier action, her strength really starts to take shape. One character that never makes much sense to me is Lila's little daughter Clara, who talks and behaves like a mature person even though she's only a toddler. [She reminds me of Ren-esme – the hybrid human/vampire baby from the Twilight series of vampire books.] I think it's asking a lot of me as a reader to believe that a little human baby can talk and make sense of complicated relationships and far-away places because she's been affected by the clairvoyant aliens nearby since before she was born. Aside from that weirdness, I do really like the story.
I didn't review each book in this series as I read them, so I'll just say about Alien Invasion Books 1-4, by Sean Platt and Johnny B. Truant, that I read them with great enthusiasm and stayed up late several nights to do it. I'll probably have to re-read a bit when I dig into the final 3 installments of the series because there are so many details and characters, but I look forward to the ride.