For me, the main problem was that I felt the story flatlined a bit. The climax was underwhelming & I found myself getting more and more frustrated with Mary and her fascination with the ocean. Her involvement with the brothers, Harry and Travis, started off genuinely interesting just like the rest of the book, fraught with young adult angst, but it never really progressed or traveled anywhere new. At first, it had the slight similarities of a young adult version of The Handmaid's Tale by Margaret Atwood. The fanatacism of the Sisterhood combined with environment of a post-apocalyptic sheltered community gave the book a strong start. However, the rest of the action didn't seem to live up to its promising beginnings. I'd say it was a decent zombie read, though overall, I don't feel satisfied or fulfilled by the end of the book. My interest in reading the next book, I would say, is halfhearted at best though I'll probably do so because I can't leave a series unfinished.