“In the penumbra, the fading dusk gorgeted by coral and gold, you could be forgiven for mistaking the ruined house a ribcage, the roof its tent of ragged skin. The foundation, at a careless look, could pass for bones, the door for a mouth, the chimney a finger crooked at the sky, or at a wife who would not be a savior.”
-page 1, The Salt Grows Heavy
The Salt Grows Heavy is a 2023 speculative horror novella written by Cassandra Khaw. Khaw is known for their video game writing and award-nominated novel, Nothing But Blackened Teeth. One of the newest entries in a long-line of acclaimed writing, The Salt Grows Heavy is a haunting, traumatic, and romantic story about two directionless people in a kingdom ravaged by apocalypse.
The novella is told from the perspective of an unnamed mermaid, fresh from the gruesome aftermath of her spawn decimating the kingdom in which she was imprisoned. She sets out to leave the kingdom. With no destination in mind, she is joined by the castle’s only survivor, the Plague Doctor. Together they encounter dark magics and discover there are far worse than ravenous mermaid-daughters haunting the decimated land. While this novella has threads reminiscent of The Little Mermaid, Frankenstein, and Pinnochio it combines them all into a depraved story much greater than its parts.
Spoiler-Free Review
I loved The Salt Grows Heavy. The prose is utterly enchanting, with the writing just as haunting as the events in the novella. Additionally, the Mermaid and Plague Doctor are gripping characters. I was so invested in their journey, I couldn’t put down the novella. The backstory of the characters is well-woven with present events, so as to be just as engaging as the action. This is a gory, dark novella, which I usually can’t stomach, but found palatable in Khaw’s clinical yet poetic descriptions.
Spoiler-Filled Review
As previously mentioned, even though this usually would be too much for me to handle, I could not put down The Salt Grows Heavy. The Mermaid and Plague Doctor, who is revealed to be a flesh golem of sorts, encounter a camp of children who worship The Plague Doctor’s creators as gods. These terrifying entities repeatedly kill, maim, and resurrect the children for their own entertainment and immortality—stealing the children’s organs to replace their own. The Mermaid and Plague Doctor endeavor to save these children. Soon they develop a love for each other that is tested by the bounds of mortality. Both characters are endearing in their attitudes, interactions with the world around them, and romantic interest in each other.
The world-building within the novel is heart wrenching. The Mermaid is a clear The Little Mermaid-type character, but with each plot point given a devastating twist. Her Prince is cruel, killing her sisters, cutting out The Mermaid’s tongue, and keeping her imprisoned away from the sea. Though he soon regrets this when his kingdom is overrun with voracious flesh-eating mermaid-daughters. The post-mermaid apocalypse world (already such a fun concept) is intriguing and filled with little horrors.
Of note, while I loved this book, I understand that some may find the prose difficult to get through. Additionally, this has the potential to be a heavily triggering book. There is prevalent gore, torture, abuse, child death, child suffering, and loss of pregnancy. That being said, I would not have considered myself able to read this book if I’d read the trigger warnings ahead of time. If you want to test your squeamishness or already have a strong stomach for the macabre, I’d highly recommend The Salt Grows Heavy.

(4.9 / 5)
Consider checking out Cassandra Khaw and Richard Kadrey’s new release, The Dead Take the A Train, available for preorder now!