I just recently finished reading this book, and I loved it. The characters were great, and there was action in the book, which I liked. I also enjoyed how Lena grew as a character in this book, and we got to see that. She's been through so much since Delirium. I loved Alex in Delirium, I didn't know if i'd like Julian, and I don't really. I thought maybe he'd grow on me, but he didn't. I recommend this book, if you read Delirium and enjoyed it, I feel like it's more fast paced though.