Allison Sekemoto has been though a lot in the past year. From being a Fringer, always hungry and scared of being caught, to being Turned, because her only options were Vampireism or death. Allie has also lost the boy who saw her as more than just a monster but as someone worthy of love. With an evil and psychotic Sarren on the loose, Allie along with blood brother Jackal and Master Vampire Kanin have to stop him before he releases a virus which ends the world as we know it. 
 The Forever Song is the final book in the Blood of Eden series and one I've been waiting on for a while. I've come to really enjoy Ms. Kagawa's characters and had high expectations for just how this series was going to come to an end. 
 After the events in The Eternity Cure, Allie has had enough. Trying to be a vampire Kanin's way just isn't working and her heart just can't take being broken any further. Embracing the cold vampire monster inside seems to be working out well for Jackal and it would certainly save Allie from having to feel how she does at the moment. I like how much Allie has grown since the start of the series. She's always been street-smart but she's not invincible despite her vampireism. She is strong yet fragile, caring yet maintains the ability to be clinically detached when she has to. She does at times let her heart reign over her brain but that ability to not be ruled by logic is what sets Allie apart from other vampires. That said, there were times when I felt she was a little to angsty and I never believed Allie would let her personal problems over shadow the big picture. 
 Allie, Jackal and Kanin make an odd little group but they work well together. Kanin the father who has grown weary after having to listen to his children squabble with the other two needing someone to argue with either for entertainment purposes or so they don't dwell on just how much of a suicide mission they are on. They definitely put the "fun" in "dysfunctional" but they are a family, not from birth but their blood connects them. The three being together on their mission and their interactions were a highlight of this book. 
 There are a lot of surprises and some not-so surprising revelations in this book. I'm very glad I read it. The dark and creepy atmosphere was spot on and is one of the things which is consistently amazing throughout the series. I felt like the ending was a little too neat and somewhat unrealistic considering everything that had led up to that point. Jackal remains one of my favourite characters and it was nice to see his development over the three books. 
 If you're a fan of the Blood of Eden series, I strong recommend this book. It's nice to spend more time with characters and be drawn into the dark and mysterious world Julie Kagawa has created. This series is one of my favourite vampire ones in the Young Adult realm with the monsters being truly horrifying and the romance being heartfelt. This series is the first I've read by Kagawa and I enjoy her writing style. I'll definitely be reading more by her in the future.