Another incredible book in the Covenant series that I immensely enjoyed. The story keeps getting more and more interesting and has ended on a note that will no doubt make for an amazing conclusion. 
 Alex is still under Seth's influence at the start, and I was kinda worried it would stay that way for a while, but thankfully, she goes back to her normal self pretty soon. However, the parts before made me quite sick when she referred to Seth as "my Seth" which just made me wanna barf. Apart from that, Alex is great in this book; she's still snarky as ever but maturing quite quickly and not making dumb mistakes anymore that she used to. 
 Aiden is cute as ever. Their romance gets even steamier and i didn't think that was possible after the last book. They are just such an adorable couple and i loved reading their moments together. I loved how protective and supportive Aiden was of her and didn't give up on her the entire time. 
 Seth isn't that much in this book, mostly he just has random conversations with Alex through their bond. He annoyed me soo much and we find out even more stuff he did that made me wanna rip off his head. I understood why Alex was still hoping for him to turn good, but it still pissed me off. He is way past the point of return and i don't have much hope for him. 
 Apollo is still one of my favourite characters and i just love reading about him and seeing his different sides. The other main characters also return and are there for pretty much the whole book. 
 We get to see the underworld in this book, which was probably my favourite part and made me really excited. We also get to meet a lot of dead characters and also some new gods. The big question about Seth's bloodline is answered and its revealed who is behind Seth and Lucian's plan. This was a big shocker for me and will take you by surprise too. 
 There is tonnes of action in this that i thoroughly enjoyed and the cliff-hanger has me anxious for the next book. After reading apollyon, I know that the conclusion is going to be epic and I will be counting down days till I get the chance to read it. This is one of my all time favourite series and i know everyone's gonna love it