i don't know why I waste my time with this saga. the characters are still idiots and the author is not able to show me how good they are doing on Earth, she can only tell and after three books, I had enough. 
 beside that, the situation is like that: the dropships crashed on earth (very near where the 100 are, what a coincidence!). there are a lot of dead people and a lot of injured, but the conversations and thoughts they're having are the type "how good is to see you here!" or "is that your boyfriend" or "I would give so much to have leggings as the ones she is wearing instead of these torn jeans". and after 50% of this kind of things I had enough. i skimmed the rest of the book and read the ending which I couldn't care less, and I declared the book as read. I wasted enough time with it. 
 ps: if someone ever understands why the character of glass was in this book, please let me know. it's still a mystery for me.