I kept seeing this book everywhere online. Everyone seemed to be raving about The Sword of Kaigen.

Now I understand why.

This is a beautifully written, emotionally rich story. It was also the first fiction book I’ve ever listened to on Audible — and I truly enjoyed the experience.

If I could, I’d give it 4.5 stars.
But since that’s not possible, I’m giving it 4 — and here’s why.

Some parts felt unnecessary.
There’s an entire chapter devoted to comparing two fictional religious philosophies. It slowed down the pacing and didn’t feel essential, especially knowing the book won’t have a sequel.

That’s my main issue. The world is so vivid, yet we won’t get to see more of it.
There’s so much potential for expansion — more of Robin’s story, more of the empire, more of the hidden forces behind the conflict.
It reminded me of how Tolkien built on The Hobbit to create something much bigger. I wish the author would do the same.

The ending also felt like it stopped halfway.
The characters accept their reality and move on.
As someone who grew up in a socialist country, I understood that deeply — sometimes you simply endure, keep quiet, and carry on.
That part hit hard.

The emotional depth and philosophical commentary were powerful, but occasionally a bit too much.
I respect the choice to explore a mother’s inner world in such detail, but some parts felt overly explained.

Still, I have nothing but admiration for the author.
She created something incredible — and did it as a self-published writer. That’s an achievement on its own.

I also want to praise the narrator.
He turned this already brilliant novel into an unforgettable audiobook.
The voice work was excellent, with clear character distinctions.
Although I struggled at first with the Japanese-sounding names, the story’s structure and context helped clarify everything as it went on.

Everyone should read this book — especially those new to fantasy.
It’s one of the most modern, emotionally intelligent fantasy novels I’ve come across.
As I listened, I kept thinking: this needs to be a film.

I really hope it will be one day.