The Demon King is the third and final installment of Peter V. Brett’s Nightfall saga, closing the saga of Olive Paper and Darin Bales, as well as the world introduced in The Warded Man, the first Demon Cycle novel. For now, at least. The second installment, The Hidden Queen left readers in a lurch, with Olive and Drin’s fate hanging in the balance. Brett’s no stranger to these kinds of middle book cliffhangers, something he did with the end of the story in The Daylight War, the third book of the original series.
He is known as The Prince of Lies. The Father of Demons. He is Alagai Ka, the Demon King.
Though humanity won a hard-fought victory in its war against demonkind, the Demon King has escaped in search of a new queen to restart his dark hive, and has found signs of one on a distant shore.
But pursuing him are humanity’s best hopes: Olive Paper and Darin Bales, whose legendary parents brought demonkind low once before. Olive and Darin will not rest until the demons are defeated, and so relentless is their hunt that they have followed Alagai Ka across the sea to a strange new land.
There they discover a culture unlike any they have never known, where demons live alongside humans as servants and companions. And there they meet the demon’s masters–including a seductive prince who is drawn to Olive–who seem unable or unwilling to understand the danger they are in.
Because no human is safe from the Demon King’s thirst for war–and every human must join the battle against his kingdom of death.
Picking up almost immediately after The Hidden Queen, Darin and Olive find themselves across the vast sea on a previously unexplored continent in this world. They find humans and demons, with the demons in thrall to the humans serving as a source of power and magic. These people have harnessed the demons and built a shining city as a result of the powerful magic. Their views on Alagai or the Demons differs quite significantly from Thesa/Krasia. Killing demons, even calling them Alagai is considered a major social blunder. It just is not done.
Darin and Olive have a great deal of adjusting in this new land as they continue their hunt for the Demon King, Alagai Ka. Despite their pleas, these new people don’t quite see the threat posed by a new demon. They think him another demon they can shackle and use as a power source. These new people; however, have never encountered a freed, powerful demon king in all its craftiness and magical abilities.
One does not expect the final novel in a series to divert so far from the path laid out in the prior 7 installments. However, that’s exactly what Brett did in this final novel. Taking the action away from the characters and part of the world readers knew is a bold move. Readers have only Darin and Olive as their points of familiarity so in some ways, meeting a group new people – especially after being with largely one group or region for 7 books prior – felt a bit unique for me.
That said, I liked the culture clash that was at the front of much of the story, with Darin and Olive aghast at how these people dealt with and interacted with demons. Many people in this foreign culture and land were equally disgusted by Darin because his parents ate Demons, a practice considered a crime in this land. There’s also an acceptance Olive never had back home – her intersexuality set her apart in many ways, but in this new (to them) land, it is seen as something denoting power and honor. This veneration Olive receives contrasts with her near disgust at these people’s practice of keeping demons as leashed pets gave her. In addition to this inner conflict, conflict, Olive was also afforded the opportunity to connect with another person just like herself, something new and welcome.
Darin continues his doubts and depression, understandably since his mother perished at the end of the previous volume. He’s so focused on hunting the Demon King, despite the nonchalant attitude of these new people, he doesn’t have much room to process his feelings of grief. I like Darin and appreciate the care Brett put into constructing a hero with doubt and depression.
This book overall, though…. I am very conflicted. I enjoyed seeing another perspective on how to deal with demons, I liked seeing Darin and Olive in a new light, and yet… the story felt like a side quest from what came before and where it seemed the story was heading. The final conflict with the Demon King was always going to be a part of this novel and trilogy, but getting there certainly felt like a distraction from the mainline story and world of what was laid out in the previous 2 novels of this trilogy and the 5 novels of the initial Demon Cycle saga as well as the short novels set in the world.
Did I enjoy The Demon King? Sure, I liked it and Brett honed some of his character work even further with this installment. I like the world-building quite a bit and find the Demons to be continually fascinating. However, with the route the this concluding volume took, I feel like the story as presented here would have fit in the greater story if it were interspersed in the middle of the saga rather than the end. Instead, I felt this novel was a little disconnected from what came before.
There’s a term in TV storytelling called “backdoor pilot,” (beware, that links to the time sink that is TV Tropes) where one episode for a (usually) long-running series strongly highlights a new character or group of characters previously not met. That episode, if received well, can serve as a launching point for a new show with that just introduced group of characters. That’s what The Demon King felt like to me. In some ways, as if Brett was setting up the next phase of this world/milieu rather than closing out what is ultimately an 8-book saga. Heck, that happens quite often in long running series where the final book can sow seeds for the next larger chapter. Here… it felt out of sync with the series as a whole for me.
In the end, I enjoyed the novel – I was largely enthralled from beginning to end, I was emotionally tied to the characters. I find Brett’s world intriguing and fascinating. While I appreciate that not all questions were answered the ever-curious part of me wants to have some kind of definitive answer about this world… is it our world, but in a distant time after a major war like Shannara or The Dark Tower or were the Demons some kind of invading force? Did humanity do something to make the Demons aware of our world? It is fun to play that “What if?” game. But I can’t quite kick the aforementioned disconnected/side-quest feeling about the novel. I’ll miss the characters and their odd (especially for Epic Fantasy) almost country/southern inflections.
Kudos to Brett for completing a mega series, I respect the gumption it took to end it the way he did and I’ll certainly be on board for the next saga and world Brett shares with readers.
© 2026 Rob H. Bedford
Hardcover | Del Rey
April 2026 | 451 Pages (Plus Appendix)
https://www.petervbrett.com/
Review copy courtesy of the publisher, Del Rey
