A bit of mystery, some awesome science fiction, deception and a lot of intrigue. (And quite a bit of strange too if we are honest.) 
 My heart really went out to Amy, worst outcome possible for her.. But she handled it well, focusing on searching for solutions instead of wallowing in self pity. She has good character depth and really had me engaged. 
 "I never thought about how important the sky was until I didn't have one." 
 Elder impressed me, he is brave for his upbringing. He could have easily been an empty vessel doing as he is taught but he thinks for himself and wants the best for everyone. 
 "Power isn't control at all -- power is strength, and giving that strength to others. A leader isn't someone who forces others to make him stronger; a leader is someone willing to give his strength to others that they may have the strength to stand on their own." 
 "This ship is built on secrets; it runs on secrets"