Well, all I can say is, THIS IS HOW YOU FINISH A SERIES! 
 This is the last, and my absolute favourite, installment in the 5th Wave dystopian series and I am so incredibly sad my journey with Cassie and co. has come to an end! Yancey has created such a stellar cast of characters that overwhelmed me, moved me and had me screaming with both laughter and pain. I became so emotionally invested in their main objective as well as their individual plights and I think this is in part due to the brilliant construction of their characters as well as the sublime and lyrical quality to the writing. These combined to transcend the confines of the YA genre and create a stunning masterpiece! 
 The whole series is concerned with the question of what humanity exactly is, and I think each individual character and Yancey's creation of them perfectly summed this up: they are humanity. They are real human beings that have evocatively been brought to life and I feel like I have lost a family now this series is sadly at an end!