I love this book! It is better than the first one. 
 I was impressed with Lena in this book, she becomes stronger, braver and independent. She learned a lot in the Wilds . The Invalids who saved her taught her a lot of things, there is freedom in the Wilds but there struggles that she must endure like the cold weather while they camp for miles. 
 Lena met Julian Fineman of DFA (Deliria Free America), they were kidnapped by the Scavengers. They get to know, trust and cooperate with each other to escape from those Scavengers. There are annoying parts though.. *avoiding spoilers.. 
 I can't wait for Requiem! The ending was such a cliffhanger.. All I can say in the end is "What are you going to do Lena? What are you going to do?" :))