Since this is the 4th book in a series I'll keep this review short and spoiler-free! This is one of my favorite sci-fi series, and I really enjoyed book 4 in this series!

My favorite thing about this series is the diverse set of characters. There are so many personalities and ages, which makes this book such a fun read. I also love how this one had multiple narrators. I loved hearing the book from both Sam's and Marina's perspectives, as well a John.

My favorite characters had to be Six (although she wasn't as big a part of this one as previous books in the series) and Ella. Six is such a strong female character, but I'm loving seeing the other side of her, too. Then there's Ella. I really like how she's growing up, and I loved reading about her. I like how she's becoming a bigger part in the story.

I really liked how the book progressed. There were shocking revelations, and tons of action! These books are so fast-paced and entertaining! I really liked this one, and can't wait for book 5!!