This is one of the most difficult reviews to write ever. There's just so much to say! But there's so much I can't say without ruining all the things. 
 I can say that once again, Oliver impressed the heck out of me. 
 Not gonna lie, I wasn't a huge fan of hers after finishing Before I Fall. It felt like I invested so much time in a book and in characters that never quite achieved redemption (for me). So, when I went to read Delirium, I was super worried it would happen to me again. 
 You should all know that didn't happen, because I fell in love with Lena and Alex's story. I am in awe of the world Oliver has created - a future where love is thought to be a disease that people have to be cured of. For me, it just seems so realistic and possible (and a little frightening), because in a sense she's right. Love is a disease. It can make you do things you never thought possible. It literally takes you over and runs your life and in some cases, you answer to it above all else. 
 It's what drove Lena's decisions in Delirium and what led us to that EPIC FREAKING CLIFFHANGER OF AN ENDING. I was so flaily and could not wait to get my hands on a copy of Pandemonium to find out the answer to the question everyone who read the first book is asking: 
 IS HE ALIVE? 
 Oh, wait, you thought I was going to answer that? LOL 
 Nope. Not happening. 
 Pandemonium flashes between Lena's time following the end of book one, and where she's at in present time, as a member of the revolution. We get to see her struggle and grieve as she acclimates to becoming an invalid and adjusts to her new life in the Wilds. 
 Alone. 
 And then we get to see how being one of them has changed her. 
 She's not the same scared girl she was in the first novel. Losing the love of her life has made her stronger, more vigilant. And you know how much badassery makes me a happy girl. Lena definitely earned her 'caren thinks you're a badass' badge here, folks. 
 This novel is full of ups and downs and highs and lows and a few spectacular HOLY SHIT DID THAT REALLY JUST HAPPEN moments. Never before have I been so torn about the future for characters as I am with this one. I hope you'll give it a chance, because I can't be the only one flailing over here.