Thank you NetGalley and Boozhoo Books for the ARC in exchange for an honest review!
If you like creepy underground settings, terrifying creatures, and a whole lot of body horror, “What Feeds Below” by Tatiana Schlote-Bonne is definitely a book that will stick with you. It’s basically a nightmare adventure set in a massive underground chasm called the Void, and it’s as gross, intense, and fascinating as it sounds.
The story follows Petra, a guide who takes thrill-seeking tourists down into the Void, which is a dangerous cave system filled with bizarre plants, deadly animals, and plenty of things that would love to eat you. Petra and her best friend Jade run these tours to make money so they can eventually build a better life, but everything falls apart during a mission when Jade gets stranded deep in the Void.
Naturally, Petra decides she’s going after her, even though the deeper layers of the Void are way more dangerous than anything she’s dealt with before. Along the way she teams up with her childhood friend Flint, who is basically the more practical voice of reason compared to Petra’s questionable decision-making skills.
The first part of the book focuses on Petra trying to rescue Jade, but that storyline actually turns out to be more of a setup for the real adventure. Once Petra, Jade, and Flint decide to travel all the way down to the Sixth Layer, the deepest and most dangerous part of the Void, the story really kicks into high gear.
One of the biggest highlights is the worldbuilding. The Void is incredibly vivid, with different environments like underground forests, caves, abandoned ruins, and lakes filled with bizarre lifeforms. Petra is also obsessed with studying the Void’s plants and experimenting with them to make medicine, which adds some cool detail to the setting.
But fair warning: this book is very heavy on the horror. There’s a lot of gore and body horror, including dismemberment, mutated bodies, parasitic creatures, and plants that can literally grow inside people. It’s the kind of book that will make you say “ew” out loud more than once. If you love body horror, then you will absolutely love this book. The author does not pull any punches with the descriptions, which are quite graphic, especially for a YA book.
The relationships between the characters are also a big part of the story. Petra and Jade have a really intense bond since they basically grew up together, but their friendship gets complicated as the story goes on, especially once it becomes clear that Jade is hiding something huge. There’s also a bit of romance between Petra and Flint, but it’s pretty subtle and doesn’t take over the plot.
The pacing is a little uneven at times. The rescue mission feels a bit anticlimactic, and it takes a while for the deeper expedition to start. But once the group heads toward the Sixth Layer, the action ramps up quickly and the story turns into a nonstop survival adventure.
There are also some interesting themes mixed in with the horror. The book touches on things like survival, loyalty, identity, and even the ethics of dangerous tourism since guides like Petra risk their lives to protect wealthy adventurers exploring the Void.
And then there’s the twist. There’s a pretty big reveal involving creatures from the Void that can disguise themselves as humans, and while you might see part of it coming, the full extent of it is wild and changes how you see the characters and the world.
The ending leans fully into the horror vibe too. It’s twisty, unsettling, and leaves you with that lingering creepy feeling long after you finish the book.
Overall, “What Feeds Below” is a dark, cinematic mix of fantasy, adventure, and botanical horror. If you’re into stories about dangerous expeditions, monstrous ecosystems, and characters trying to survive in a place that definitely wants them dead, this one is a pretty unforgettable ride; just maybe don’t read it while eating.