** spoiler alert ** 
 First before I go on a rant let me say that it was actually a good book. I did not waste my time.I am glad I read it, and would recommend it to others. However there were some concepts that I did not agree with. 
 1. Waverly, I believe, was uncessarily violent. It shocked me how she showed absolutley no compassion towards her captor, Anne Mather, nor considered for a second that she was also a human being and deserved to live no matter what she had done. No, it was just kill, kill, kill. 
 2. Anne Mather was part of religion. She believed in God and said that He had sent the girls she had kidnapped to her. Therefore, Waverly starts to associate religion, services, and any other talk of His plan to be evil and corrupt. However it's not just the character that believes this. It has the feel that the author does to. Waverly said something along the lines of "You can't pretend to know God's plan, yoy can't be a prophet." But can't we all say that everything that has ever happened in our lives is part of God's plan? When has believing in God ever been a bad thing? 
 3. The romantic relationship. the second I opened the and read the first couple of paragraphs which outlines Waverly and Kieren's relationship, you feel it. They PERFECT chemistry. The most perfect chemistry that I have ever possibly seen in a book. Except for on the flap it says that Kieren is "too perfect" or "the golden boy." And that Waverly is "unsatisfied" and is "secretly intrigued by shy, darkly briliant Seth." You do not create another character for her to fall in love with when the first two already have perfect chemistry! Seth and Waverly have no chemistry. None. The only indication that there is any romance there, is Seth admitting of thinking about her once, and Waverly's weak yearning. Besides she spends like two seconds with Seth, while she asks him why he beat up Kieren. 
 4.Kieren is not perfect even though he is supposed to be. He makes lots of mistakes, which Seth loves to point out and torture him with. Even though their ship just got attacked and there are no adults on board that aren't invalid or unable to give orders. No, Seth is just worried about his pride. Seth is obviously supposed to be the passsionate and tortured one. Insted he is the torturer. He is violent, mean, and a plain jerk. While Kieren is very nice, sensitive to other's needs, and builds moral. But Seth is the one who Waverly is for and he should be commander of the ship, and should save Kieren from himself. What is wrong with this picture? 
 I also never found out why it was called Glow. I don't even think it said the word in the whole book. 
 Other than that, really it was a good book.