
Rating: 4š
Shadow Throne King is the third novel in Kai Butlerās Emperor’s Assassin series and I thought this is where the series would be wrapped up.
But thereās more to come and Iāll be honest, Iām struggling a bit here.
Butler has written about a complex political situation, with an equally strong layered world upon which the author made its foundation. Kingdoms at war, subtly and magically. Ice and fire, ancient blood magicians, and monstrosities abound.
And dragons as well as things that lurk in the dark.
Thatās all pretty exciting. Love the ravens. And the characters are, individually, intriguing and given strong backgrounds.
Based on its elements alone, itās a 4.5, as a series and story. Solidly crafted and executed so well that I really enjoyed it.
Especially that last section of dramatic fights and flight from the mountain. So excellent and moving. I was with those mountain badgers and their families every single step. And that song at that moment? Heartbreaking.
What Iām struggling with? And shouldnāt be is the relationship between the two main characters. I feel absolutely no connection with them. Individually yes. Together no.
I just donāt find them credible as a pair. No real chemistry between them. And Kai Butler can write chemistry like crazy. Just read Butlerās The Empty Throne Trilogy. But, at least for me, Iām not feeling it here.
I enjoy Airon, the northern assassin/Prince Consort, although at times I feel that heās not consistent enough in his character for me here. Heās a trained assassin. Yet he doesnāt know to trust his instincts here in the story? Particularly regarding a certain character whose actions are screaming donāt trust me?
Things like that in a character and storyline just will take a reader right out of a narrative quickly. As it did me several times here.
For me, it just highlights that you can have all the āpretty things ā like great world building and details but you need to get the actual substance, the core , the relationship right for a story to feel complete. And at book three itās not happening.
But could be thatās itās just me. So for all the great execution of the plot and characters, 4 stars.
Cover by Hannah Latham at oexasart
Emperor’s Assassin series:
Betrothed to the Emperor #1
Emperor’s Wrath #2
Shadow Throne King #3
Dragon Blood Curse #4 – March 16,2026
Buy link
Book 3 of 4: Emperor’s Assassin
Blurb
As the Imperium crumbles beneath our feet, will I be able to keep hold of Tallu?
The imperial generals who so loyally served Tallu’s monstrous father have declared war on us and fled the capital. The enemy nation of Krustau claims to have Empress Koque and Prince Hallu, the second son of Emperor Millu. If that is true, Krustau would have claim to the Imperium’s throne.
Unable to risk the possibility that Tallu’s brother could fall into the wrong hands, Tallu and I must confront a greater threat than either of us could dream of. Will Tallu’s secrets lead to our loss or will he finally trust me with the truth he can barely whisper in the dark?
- Publication date: October 27, 2025
- Language: English
- Print length: 394 pages
- Book 3 of 4: Emperor’s Assassin
CW: Animal death (temporary), dismemberment, death.








