I loved the level of action and mystery in this book. From the very beginning, you can tell all is not right in this underwater 'utopia', but you can't imagine the full extent of control and insanity that Mother has inside her little head. The main character, Evie, is made to forget things almost daily, so this was a little confusing in the beginning because it's told from her POV, so you're like 'what is going on?'. The romance was cute, but kind of builds out of thin air. Evie just feels these intense feelings for the surface dweller, Gavin, for no apparent reason. But they grow to trust and depend on one another and refuse to leave the other behind. The reason I gave it 3 stars was because the twist was just kind of blah for me. Instead of an 'oh my gosh!!' reaction, I was like 'umm oooooo.....kay.', but still an interesting read.