To be honest, I'm scared of reading this book. 
 I just have no idea what will happen and I heard a lot of negative reviews about it. 
 I mean, Pandemonium is a cliffhanger. I just want to know what will happen to the love triangle. 
 The ending was bittersweet to me. It's like no one knows what will happen on the future. Let's just say I'm a bit disappointed because I am looking for a closure with everything. I didn't expect this would be the ending of this trilogy. Seriously? What's happening on Dystopian Trilogies? Why does it always end up like this? :( gaaah! Obviously, no more next book and I don't know (view spoiler)[if Lena is going to choose Alex or Julian. Can you choose one my dear? You can't have them both! (hide spoiler)]. 
 On the other hand, I started to love Hana's character. I hate her when I've read the novella but when she told the truth to Lena of what she did, that was really brave. She still remains Lena's best friend by helping each other till the end. I like her character than Lena. Overall, it's still a good trilogy. Sadly, this is my least favorite among the three.