When it comes to sci-fi books, you got to really grab me. What I loved about this book are the characters growth and coming to understand things.The characters of this book go through a lot. Separated from what they only know and desperate to get back to each other, Glow had me happy at watching teens come mature right before my eyes. Being stuck on ship with no adult supervision, I can imagine what that would be like. I like that the author gave a realistic feel of the teens breaking down. They cried, got scared and some majoringly freaked out!I also like how the plot line settled between crossing the lines of a cult and well crazy people. It always intrigues me how people could be so gullible to believe such lies. I do however, like how the girls questioned things and rebelled. It made me happy that there is someone left on the ship who is not crazy.This book overall is a great book that can cause a great amount of stress. By that I mean a good stress. I loved that while reading this, I felt the anxiety to leave the ship and to find the others. I loved the question-ability of whats is really going on. But most of all, I loved the fight that both the girls and boys gave.If you want a great book of space exploration, teens fighting at the edge of the mountain trying to claim back what is there's. Mostly a group of people how have gone to far off the deep end, read this book. Faced with unattainablility to get back to each other, they must face what is wrong before them and go after what is right in there heart.