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Wolf Worm

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Something darker than the devil stalks the North Carolina woods in Wolf Worm, a new gothic masterpiece from New York Times bestselling author T. Kingfisher.

The year is 1899 and Sonia Wilson is a scientific illustrator without work, prospects, or hope. When the reclusive Dr. Halder offers her a position illustrating his vast collection of insects, Sonia jumps at the chance to move to his North Carolina manor house and put her talents to use. But soon enough she finds that there are darker things at work than the Carolina woods. What happened to her predecessor, Halder’s wife? Why are animals acting so strangely, and what is behind the peculiar local whispers about “blood thiefs?”

With the aid of the housekeeper and a local healer, Sonia discovers that Halder’s entomological studies have taken him down a dark road full of parasitic maggots that burrow into human flesh, and that his monstrous experiments may grow to encompass his newest illustrator as well.

288 pages, Hardcover

Expected publication March 24, 2026

298 people are currently reading
42472 people want to read

About the author

T. Kingfisher

57 books26.7k followers
T. Kingfisher is the vaguely absurd pen-name of Ursula Vernon. In another life, she writes children's books and weird comics, and has won the Hugo, Sequoyah, and Ursa Major awards, as well as a half-dozen Junior Library Guild selections.

This is the name she uses when writing things for grown-ups.

When she is not writing, she is probably out in the garden, trying to make eye contact with butterflies.

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Displaying 1 - 30 of 1,305 reviews
Profile Image for Jamie.
496 reviews835 followers
December 4, 2025
Trigger warning: insects. So many insects. All the insects. And not cute insects like butterflies and ladybugs … we're talking screwworms and botflies here. I'm not generally scared of bugs and am very much a “catch and release” sort of person when it comes to creepy crawlies in the house, but even I was a little squicked out by this book.

Also, can we take a moment to marvel over what a prolific writer Kingfisher is? I'm pretty sure this is the third ARC of hers I've read this year, and I know there was at least one other ARC that I never requested due to a (admittedly very short-lived) NetGalley hiatus. She's one of my favorite authors, though, so I'm certainly not going to complain.

Anyway, Wolf Worm is a creepy story about parasitic insects and the lengths people will go to in the name of science. You may or may not find this book particularly scary depending on how you feel about insects, but there's definitely some body horror and several pretty gross scenes. I enjoyed it and was decently invested in the outcome, but I have to admit that this isn't one of my favorite Kingfishers. There's nothing particularly wrong with it, but body horror has just never been one of my preferred types of horror.

But, still, I mean, it's Kingfisher. This book is well written and suspenseful and kind of horrifying in parts. It's a slow burn, especially at the beginning, but I actually really enjoyed learning about all of the different insects. While I had some vague knowledge that botflies and their larvae existed before reading this novel, I am now absolutely terrified of encountering one in real life. Fortunately, I live in the northern US where such things are less common, but I'm probably going to wear a full beekeeping suit the next time I travel to Central or South America. Better safe than sorry, that's what I always say (especially when it comes to maggots that burrow around in your flesh).

3.7 stars, rounded up.

Many thanks to NetGalley and Tor Nightfire for providing me with an advanced copy of this book to review. Its expected publication date is March 24, 2026.
Profile Image for Ricarda.
553 reviews398 followers
October 26, 2025
You know, I was just thinking that T. Kingfisher was missing some kind of bug/insect/vermin horror in her repertoire, and here it is. The book does take a while to really get going, though. At first we follow the scientific illustrator Sonia Wilson in 1899 as she comes to North Carolina to work for the bug specialist Dr. Halder. She is not looking forward to drawing all the insects that the doctor collects and studies, but she really needs the job and she just wants to do some good work. But already upon her arrival she hears something about the Devil living in the woods and about blood thieves mutilating bodies and Sonia might need to deal with more than she has signed up for. Her new employer also turns out to be a very rude man and the huge mansion he's living in is notably understaffed, so you can be sure that something sketchy is going on.

If you've read many other books by T. Kingfisher then chances are good that you stumbled upon the female-protagonist-goes-to-new-house-and-strange-things-start-to-happen formula before. I think I would be annoyed if any other author uses the same structure over and over again, but with her it just always works for me. The books are all different enough and they usually introduce cool, new concepts and intriguing plot elements. We've had curiosity shop dimension portals (The Hollow Places), weird bone animals (The Twisted Ones), underground rose children (A House with Good Bones), mean birds in the desert (Snake-Eater) and now we have different kinds of parasites in the woods. Kingfisher just always manages to hook me and she never fails to provide stories that I wouldn't get from anyone else. Her characters often have an unusual task to complete or they work an interesting job in general. Like, where else would I be able to read about a scientific illustrator making her way through a whole library of bugs? It was such an interesting mix of art and science, with Sonia being always close to an artistic crisis while also doing competent work although she doesn't have any deeper knowledge about bugs. The book was actually kind of informative in that regard. For one, I found out that wolf worms do exists and that it's another name for botflies. And if you know anything about them, then you can imagine that the book got bugs-under-the-skin gross and considering that that's the last place where bugs belong, it was disgusting. The YouTube algorithm decided once or twice before that I needed to see botfly removals and it was right, I needed to see that, but it also left me scarred and paranoid and with itchy skin. Same with this book.

I do have to say that the actual plot unfolds very slowly, especially for such a short book. I found it to be dragging around the 30 to 40 % mark, because it was mostly Sonia all by herself just starting to notice weird things. I think that she was kinda missing a sidekick and constant ally. There often is an animal companion or a hot handyman neighbor in Kingfisher books and this time the main character felt more isolated. She was friendly with the housekeeper and her husband and the local healer, but they weren't as present in the book, at least not during all the important plot points. There are plenty of unanswered questions that kept me reading through these slower parts, like the mystery of Sonia's predecessor who drew the most gorgeous illustrations but who no one ever talks about or the question of what her employer is doing in the woods in the middle of the night. So I wasn't exactly bored, but all the exciting things sure happened in the second half of this book where the entire story got better in general. There are many genuinely creepy moments and enough gross scenes that this book can confidently be called bug horror. It was great how everything tied into some local history and, surprisingly, some known supernatural creatures. I also really liked the ending and, after that, the acknowledgments where Kingfisher explains which parts of the story are real and what personal experiences led to this story. Overall, this was a solid new addition to the author's horror line-up, even if it wasn't a new favorite for me.

Huge thanks to NetGalley and Pan Macmillan / Tor for providing a digital arc in exchange for an honest review.

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Pre-read: Wolf Worm? Umm, ok ... everything for you, Miss T. Kingfisher.
Profile Image for Nilufer Ozmekik.
3,180 reviews62k followers
March 23, 2026
Wolf Worm is the kind of book that creeps up on you slowly and then refuses to leave your thoughts. T. Kingfisher has a way of making horror feel intimate and personal, and this one settled under my skin in the quietest, most unsettling way.

We follow Sonia Wilson, a talented scientific illustrator living in 1899, whose entire career has been tied to her father’s reputation. After his death leaves her with nothing—no job, no security, no real future—she jumps at the chance to work for the reclusive Dr. Halder, illustrating his insect collection at his isolated North Carolina estate. It feels like a lifeline. It isn’t.

From the moment Sonia arrives, everything feels… off. The woods seem to breathe. Animals behave strangely. People avoid answering questions directly. And there’s the unsettling fact that someone held this job before Sonia—and no one wants to talk about what happened to her. Kingfisher builds dread in such a subtle way that you almost don’t notice it happening until your shoulders are tense and you’re holding your breath.
Sonia is such a strong, believable protagonist. She’s smart, anxious, observant, and painfully aware of how easily women—especially women in science—are dismissed during this time period. Her inner thoughts feel real and relatable, and they pull you deeper into the story. Seeing the horror unfold through her scientific and artistic lens makes everything feel more vivid… and more disturbing.

Fair warning: this book does not shy away from body horror, especially when it comes to insects. There were definitely moments that made me squirm. But it never feels gratuitous—it all serves the story and the themes of obsession, exploitation, and the terrifying cost of unchecked ambition.
The pacing is a slow, atmospheric burn, and while the final act moves faster than the buildup, the payoff is worth it. The tension tightens, the truth comes into focus, and suddenly everything clicks into place in a way that’s both horrifying and satisfying.

Overall, Wolf Worm is eerie, smart, and deeply unsettling in that uniquely T. Kingfisher way. It may not be my absolute favorite of her books, but it’s one that stayed with me long after I turned the last page. I’m happily giving it four stars and would absolutely recommend it to readers who enjoy gothic horror with substance and teeth.

Special thanks to NetGalley and Tor Publishing Group | Tor Nightfire for sharing another digital copy of this stunning horror novel by T. Kingfisher in exchange for my honest thoughts.

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Profile Image for DianaRose.
1,016 reviews278 followers
Review of advance copy received from Netgalley
February 26, 2026
firstly, thank you to the publisher for an arc and an alc!

t.kingfisher how can you write so many amazing novels in such a short amount of time? she is truly the brandon sanderson of her genre!

if you liked what moves the dead, then i think you will enjoy wolf worm, as the body horror premise is very similar.

4.5 stars — while i was absolutely creeped out and felt itchy numerous times throughout this book due to the insane amount of insect scenes in this book, i do feel that it could have been a tad longer? everything was wrapped up far too neatly for my liking, but i’m not terribly upset about it.

regardless, this was still a fantastic horror novel with multiple societal aspects in conversation with each other, especially religion and science in a post civil war era.

i also just love that all of t.kingfisher’s fmcs are older than 30.

as for the audio, the narrator did a phenomenal job!

very excited to dive into my next t.kingfisher arc!
——

very excited to dive into my next t kingfisher book! i love everything she writes
Profile Image for MagretFume.
309 reviews396 followers
Review of advance copy received from NetGalley
January 26, 2026
I went into this book blind. Knowing it was T. Kingfisher was enough for me, plus that cover is gorgeous. 

I'm really glad I did not read the blurb beforehand because it took some unexpected and delightfuly horrific turns. 

I loved the main character. She feels absolutely human and real. She's smart, very strong in her own way, and her inner dialogue is so funny, I would havebeen happy just to follow her day to day life. 

I listened to the audiobook version and the narrator was absolute perfection. I really think this the best way to enjoy this story and it's characters. 

Thank you so much Macmillan Audio for this ARC. 
Profile Image for Liana Gold.
391 reviews194 followers
Review of advance copy
March 14, 2026
1899, North Carolina. A naturalist/illustrator travels to an isolated community where she is asked to work for a man whose book is yet to be published. There is something strange and unsettling about this community that is set deep in the woods. Prone to sharp detail, she begins to unravel all the wrongs.

This is a Southern/Historical fantasy with horror that sneaks up on you. Oh and it has a LOT of bugs.

Full RTF!


Many thanks to BOTM and the publisher for an early copy.

Publication date: March 24, 2026
Profile Image for mj.
277 reviews174 followers
Want to read
July 16, 2025
do you SLEEP
Profile Image for shelbysbookshelf.
78 reviews6 followers
Review of advance copy received from Netgalley
March 7, 2026
SPOOKY. wolf worm is a fairly short historial fiction horror story. while horror isn’t my preferred genre, i can’t deny it was powerful enough to make me never want to see another insect ever again!

i was really impressed with the timing of this book. there wasn’t any excessive information dumping or lengthy backstories but it also wasn’t so fast paced that you didn’t get to feel the dread/suspense.

i found sonia’s nervous energy and inner monologues to be really funny! she could be pretty sarcastic when put in uncomfortable situations and i appreciated that humor in the darker settings.

the narrator did a great job! thank you netgalley for the arc.
Profile Image for Ashleigh (a frolic through fiction).
578 reviews8,836 followers
March 11, 2026
This may very well be the first horror to illicit any reaction from me. Turns out bugs x body horror is a blend that can make me feel physically ill while reading 😂

My goodness what a ride that was. Admittedly it took me a little while to get into, but once we tipped the balance from unnerving to terror, it’s safe to say I couldn’t put it down. Kingfisher’s usual witticisms proved a nice grounding point in our main character Sonia, an easy authenticity that anchored a plot which would otherwise risk feeling like surface level shock value. The story is terror embodied in all forms, from the slow creeping dread to the silent, almost blank overwhelm of being so scared you can only continue on autopilot. It’s a talent that T Kingfisher can showcase such strong emotions so wholly, so quickly. Her books always make for an interesting pick-up when you need a fast, riotous story.
Profile Image for jenny reads a lot.
751 reviews1,052 followers
Review of advance copy received from Netgalley
January 23, 2026
T. Kingfisher is the queen of the slow burn. Her narratives creep up on you, slow and steady, building momentum until they smack you hard across the face.

Wolf Worm is no exception.

It starts innocuously enough. An unsuspecting historical fiction narrative about a scientific illustrator, her new employer and the manor house she’s come to live. There are dark woods to avoid, of course there are, woods should usually be avoided, that's where monsters lurk. But where is the doctor’s wife? And why is the shed locked? And why is that animal acting so strange? Before you know it you’re filled with dread, a creeping anxiety is rising in your chest. When did this book get so scary and why can’t you stop reading?! When the dread feels like it might consume you, when you’re not sure you can take anymore—WHACK—you’re smacked in the face with the reality of the situation. But T. Kingfisher isn’t done yet… No, not at all. Disoriented from the shocking reveal, she lands the final blow, one that leaves you staring blankly at the wall, contemplating everything you thought you understood about this story. And in a final parting gift, this book asks, what makes a monster?

Each time I read a new T. Kingfisher book I find myself in awe of her talent. Her prose never misses, her themes are thought-provoking, and her pacing, which usually feels bit slow at first, ALWAYS feels intentional. She knows how to build a story that will creep up on you, and most importantly a story that will stay with you.

This book fed my soul. Let it feed yours too. (aka go read this book)

Fun fact: parasitic worms gross me the f- out. When we covered parasites in my college biodiversity class I skipped the lecture on parasitic worms, failed that section on the exam too…I had originally planned to skip this read because of the parasitic maggots, but I told myself — I’ll enter the Goodreads giveaway and if I win I’ll give it a try. THANK YOU UNIVERSE for making me try this book. It was worth the mild discomfort. Actually the parasitic maggots weren’t as bad as I thought they’d be, my college textbook definitely grossed me out more. That said, this is still highly gross (though never gratuitously so), I’m comfortable with quite a bit of body horror and you should be too if you want to dive into this one. As always if you need additional details don’t hesitate to reach out to me, I’m happy to help a fellow reader consume with care!

OH! Do NOT skip the author's note it is fascinating.

Audio Narration: 5/5 Macmillan Audio is easily my favorite audiobook producers. Mary Robinette Kowal did a fantastic job. Each character had a distinct voice, her vocal range is stellar! The pacing & pausing were all perfect and the inflection and overall performance was one I will not soon forget. Highly recommend consuming Wolf Worm via audio!


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Thank you Macmillian Audio for the gifted book. All opinions are my own.
Profile Image for Saray .
85 reviews112 followers
March 20, 2026
Had to pause reading because at some point I could not stop from gagging (the possum if ykyk) and not in a slay way. This book is incredible. It really made me have a physical reaction. I absolutely adored the main character, her anxiety and her natural curiosity. And her inquiring determination to find the answers to her question. But omg, the bugs. The insects. So descriptive and informative that you can almost feel it crawl down your skin. T. Kingfisher is a genius.

Thank you to NetGalley and publisher to send me an ARC. All opinions are my own.
Profile Image for Sammy.
48 reviews17 followers
Review of advance copy received from Netgalley
January 6, 2026
4.5 🌟

What a great way to start my 2026 reading!

This was deliciously thrilling and horrifying! I'm such a fan of Kingfisher's writing and storytelling. Every time I'm sucked into the story and get the chills. So now one with bugs?! Count me as completely disgusted. I loved it!

The beginning of the story was a bit slow, but the ending was everything!
Profile Image for CarlysGrowingTBR.
724 reviews77 followers
November 17, 2025
Book Stats:
📖: 288 pages
Genre: horror
Publisher: Tor
Format: eARC
Series: STANDALONE

General Thoughts:
Can I give a book more than five stars? Because this book deserves more than that. This book is horrific, suspense filled, and absolutely mind bending. The claustrophobia you feel, and the inherent dread that creeps across your skin throughout the duration of this book is unmatched.

If creepy crawly creatures give you issue then you definitely don't wanna pick this book up. But if you can stand some insect based body horror, you're definitely gonna love this. The story and characters were solid and even though you have an idea of what could possibly be happening throughout the story, it doesn't match up with how absolutely horrific and detailed the story actually is.

I can't even tell you the amount of dread and anxiety I felt reading this book. But in a good way that kept me entertained and reading quickly. This is absolutely a gut punch that you can't miss if you like Kingfisher.

Disclaimer: I read this book as a physical ARC from the publisher. All opinions are my own. This is my honest and voluntary review.
Profile Image for Neda B.
53 reviews3 followers
December 28, 2025
Wolf Worm is a creepy, bug-filled horror thriller that leans hard into atmosphere. The mystery stays thick and unsettling for a long time—and I loved not knowing exactly what was happening. The disgusting details only made it scarier and edgier. Another excellent, eerie win from an author I love.

Out in March.
Read as an ARC
⭐️ 5 out of 5 ⭐️

Profile Image for Me, My Shelf, & I.
1,486 reviews326 followers
Read
January 30, 2026
5/5

This was super, super, disgustingly gross... and I loved it! Probably my favourite of the recent books Ursula Vernon has written. Perhaps this was just a great intersection of my interests (from watercolor to nature to [spoilers]), but this book worked extremely well for me.

The Writing:
I really like the way that Vernon used humor here. It's definitely one of the main characteristics of her writing, but sometimes I find in her horror that it can be overused and conflict with the overall tone of the book. But much like A Sorceress Comes to Call, she struck a great balance between the characters and horrors and humor.

Audiobook Notes:
The narrator did a fantastic job with the material and employed a different number of accents and voices for the characters that made it come alive quite vividly for me. I honestly forgot it was a narration and not a film for most of the time, which is a truly exceptional talent.

But I do have to emphasize again: really, really, TRULY gross.

Thank you to NetGalley and Macmillan Audio for providing me with an ALC. All thoughts and opinions are my own.
Profile Image for Becky Spratford.
Author 4 books826 followers
January 5, 2026
Starred review in the January 2026 issue of Library Journal

Three Words That Describe This Book: Bug-Body Horror combo, Gothic with teeth, strong sense of place

Draft Review: Sonia has struggled since her naturalist father’s passing. As his assistant, and illustrator, she was able to move throughout scientific circles in ways normally unreachable for women in the late 1800s. When Halder, a reclusive and wealthy expert on parasitic and necrophagic bugs invites her to his home in the North Carolina woods to be the illustrator on his magnum opus, Sonia jumps at the chance. But of course, there is more to Halder's work and those woods than Sonia could have imagined. Kingfisher takes her time allowing the story to unfold realistically as Sonia settles into her job, works on her craft painting insects, and gets to know the house staff. But as odd things start compounding– stories of the area’s blood letting monsters, oddly behaving small mammals, a padlocked shed in the woods, and all of those flesh eating bugs– even a serious scientist like Sonia get in over her head. Not for the squeamish, this is an exceptional Gothic, with real bite, a story where every detail (from the most grisly to small asides) matters and the monsters are not always what they appear to be.

Verdict: Kingfisher, who rarely misses, has out done herself here. For fans of mad scientist horror like The Daughter of Doctor Moreau by Silvia Moreno-Garcia or Her Wicked Roots by Tanya Pell who also crave visceral details like those expertly applied by Nick Cutter.


Other words receiving votes: visceral, slow burn (but needs it to be 5 Stars), great details about being an illustrator by an illustrator, awesome protagonist with a perfect POV. Blood-letting monsters (referred to at the start and their possible existence-- if they have been eradicated etc-- is a level un unease that oversews and permeates the entire book-- not a spoiler)

Look Kingfisher is good. Nothing she writes is bad, but some are better than others and this one....wow!

I want to address a few people on her with early reviews who said that this one had too low a burn. I completely disagree. The pacing is what this story needs and in fact Kingfish makes a funny comment about it in the story itself. I'll get to that but first, Sonia is a young, awkward socially, female scientist and illustrator in the 1880s. She has spent her life studying flora mostly (but some fauna) with her father. She was his assistant. She lived this life. But when he died, Sonia was left high and dry. 1880s-- woman cannot just be scientists and scientific illustrators without a man to back them.

When Halder-- a reclusive, rich bug scientist needs an illustrator for his Magnus opus about necrotic parasites-- Sonia takes the job.

She is a city girl from the coast, moving sight unseen to the middle of the NC woods, to take a job where she knows no one and nothing. She lives there. She arrives and hears stories about the blood letting monsters in the woods. Is told to never go to alone, her room was clearly vacated by someone else who was the former illustrator quickly but also it's been a year etc....

If Sonia came in and started figuring everything out quickly, this book would have been terrible. If she was more than the awkward illustrator than she is, this book would have been terrible. She is nervous and at first obsessed with doing a good job so the book is all about learning about the people she lives with and her new boss and learning a bout bugs etc... all necessary. She is not a confident person to begin with so, when things start happening that are weird-- and they start just odd and get WEIRD-- she doesn't know what to do.

This leads to what I said about a small comment by Kingfisher that makes it clear she knows things are not moving super fast. Sonia gets to a shed in the woods that she knows hides some kind of secret and sees the lock. She actually comments on how she is not like one of those plucky heroines in a gothic novel and has no idea how to pick a lock. LOL. Reader-- it is not going to be easy for you or her.

When she does finally get in there-- WOW. What a discovery. And it is one of those discoveries that makes every detail Kingfisher carefully (but entertainingly) laid out in the story we read PAY OFF. Original and gross and so believable. There are human monsters here yes, but the supernatural ones are the ones that you are going to keep thinking about. These blood letters are not what you think they are.

Again every detail matters. If it went faster the book would fail. It is in the build up of the place and Sonia as a fully fleshed human where this book excels.

Sonia is a Gothic heroine, one who has to grow in confidence to save the day, but she NEVER uses skills others than those she has. And that is what makes it 5 stars. Feminist for sure, but not without bending to the restrictions of the time period.

The details about the bugs was great. Also, since Kingfisher is also an Illustrator, I loved that we saw her perspective on the job. Details about color and painting and caturing nature on the page. FASCINATING.

And of course-- these are parasitic necrosis bugs so we get the pay off-- it is gross and body horror and you will squirm and itch. Visceral in all the great ways.

It is Gothic in writing style and historical placement, but with the Kingfisher bite. There is so much I want to shout about that is great this book but I cannot because of spoilers.

For fans of mad scientist horror like Daughter of Doctor Moreau by SMG or Her Wicked Roots by Tanya Pell but with the visceral details found in the novels of of Nick Cutter (The Queen is bugs, but even The Troop works here).
Profile Image for Booksblabbering || Cait❣️.
2,158 reviews874 followers
November 29, 2025
The next time I see a big fly or a raccoon, I will scream.

Sonia is a thirty year old scientific illustrator who gets a job with a grumpy, reclusive naturalist. She spends her days painting bugs in an immense house that is only staffed by three and has only two residents. There are rumours about the devil living in the woods.

Sonia is anxious and tends to catastrophise.
This entire book is you questioning Sonia’s questioning as reader and heroine loses grip on reality.

Some thoughts burrow into your mind as thoroughly as a wasp larva burrows into an unsuspecting caterpillar. The trick, which I am still learning, is how to live without being devoured by them.

Like all of her books, T Kingfisher excels at creating a small, supportive community where the heroine can find solace.
There’s a cat and lots of yucky, creepy bugs.

This is probably the most body horror I have read from her, specifically in the last 35%. It is gross and I could hear the scenes.

I appreciated the vivid descriptions of water colours, even if sometimes it felt like an artistic exercise of Kingfisher as an ex-children’s illustrator.

The plot felt meandering and the horror felt quite contained. Whilst predictable, T Kingfisher had my attention with her writing.

Physical arc gifted by Tor.

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Profile Image for Esmay Rosalyne.
1,564 reviews
Review of advance copy received from Publisher
March 19, 2026
This review was originally published on Grimdark Magazine

4.25 stars

One of the only rules I live by is that if T. Kingfisher writes it, I read it, so of course I did not hesitate a moment to sink my teeth into Wolf Worm the moment it slithered onto my radar. Should I have maybe looked at the blurb so I would have been prepared for the maggots, parasitic body horror, creepy gothic manor, and monstrous experiments in the North Carolina woods? Maybe, but I would have happily walked into that nightmare anyway, so there’s that.

Set in 1899, Wolf Worm follows Sonia Wilson, a jobless scientific illustrator who accepts a position with the reclusive Dr. Halder at his manor in rural North Carolina. Her task is simple: draw the insects, mind her own business, do not ask awkward questions about the missing wife, and do not listen too closely when the locals whisper about blood thiefs in the woods. You know, normal employment stuff.

Now, Kingfisher has a true gift for giving us women who are clever, prickly, and a little odd in all the right ways, so it should come as no surprise that Sonia stole my heart the moment I met her. She is observant without being fearless, compassionate without being foolish, and I don’t think I would have made it through this book without crawling out of my skin if it wasn’t for her dry humour and (unintentionally?) funny intrusive thoughts. Honestly, I would follow Sonia anywhere, though preferably somewhere without maggots.

Also, her narration just had me in an absolute chokehold from page one, even though the first half of Wolf Worm is an absolute masterclass in restrained, slow-burn horror. We spend a great deal of time with Sonia settling in, sketching insects, and navigating the rhythms of the manor house, which could have been so boring but totally wasn’t. Kingfisher just excels at making the ordinary feel slightly off, and I loved how that careful and quiet build-up of tension just had me filled with dread before Sonia (and I) even realised something was really damn wrong.

And then, the horror kicks the door down. The second half of Wolf Worm is just one hell of a nightmarish trainwreck, and I was so here for it. I loved how the unease that had been humming beneath every chapter curdled into full body dread, complete with slippery moments of unreliable perception that made me question both Sonia’s sanity and my own. There are twists that genuinely caught me off guard, and I loved that the horror imagery in those North Carolina woods was so grotesque in a way that felt intimate and purposeful. The horror is not just there to gross you out (though it absolutely will) but instead it is invasive, personal, and deeply uncomfortable. I honestly respected it, even as I flinched.

For me, what really anchored all the terror on display in Wolf Worm is the emotional core. I appreciate how Sonia’s relationships with the housekeeper and the local healer gave the story so much weight and warmth, and the secrets surrounding Dr. Halder and his vanished wife are messy, human, and tragic in a way that I just live for. I only wish we had lingered a bit longer with some of those side characters as I felt like there was depth there that we only skimmed, and a few twists in the final stretch felt slightly rushed when I would have happily sat in the discomfort longer.

Still, Wolf Worm just crawled under my skin and made itself comfortable, and I love it for that. It is monstrous and human in equal measure, and beneath the maggots and madness, there is a sharp exploration of autonomy, otherness, and what happens when curiosity becomes consumption. I bloody love T. Kingfisher’s wonderfully strange mind, and she has full permission to give me nightmares all day every day. Just let it sink its teeth in you already, sleep is overrated anyway.

Thank you to Tor Nightfire for providing me with a physical ARC in exchange for an honest review. All opinions are my own. Wolf Worm is scheduled for release on 24 March, 2026.
Profile Image for EmJustReading.
17 reviews2 followers
March 19, 2026
A skin crawling story tied up with a bow. 🦟🪰🐛🪱 This book knocked my socks off. It’s the first book I’ve tried from the horror genre, and it really blew me away. I listened as an audiobook, and I was engrossed even during the acknowledgments at the end of the book — that’s how good it was.

It starts with Sonia moving to North Carolina to begin her job as an illustrator for an entomologist (big bug warning if you despise bugs). I was immediately grabbed by the way Sonia would describe situations; about what colors she would use to show the details, and the errors that would likely ruin the picture. I was endearing to listen to her talk about paint colors and watercolor techniques It made me want to break out my art supplies.. but not enough to pause the story.

She arrives at the train station late at night, and a man offers to driver her to Dr. Adler’s home because it’s not safe for a woman to walk through the woods. She moves into the Dr.’s large home with a few other staff, and starts to notice when he’s acting strange/ mysterious and lying about things. She hears some scary stories, or possibly just gossip, and starts to wonder about the truth (the logical, scientific explanation). Curiosity gets the better of Sonia and we get to see the continuous struggle between the metaphorical devil and angel on her shoulders.

She really leans into being a Naturalist, and her foundation in biological sciences. I appreciated how the book focuses on nature (flowers, trees, bugs, animals). It made me long for old college courses about ecology/ botany/ evolution.

The story starts off spooky and made me look over my shoulder in the dark a few times, but the further it went it felt more like a mystery/ thriller than “horror” But this is the only book I’ve read in the genre, so I have nothing to compare it to. There were some gruesomely described scenes - but I wasn’t terrified (I listened to it mostly during daylight hours though, so that may be a factor).

Typically, I don’t want a book to leave me hanging and guessing what happens next, so I really enjoyed the ending because it gave closure in my opinion. This was a great introduction to the genre and the author, and I will definitely be looking for more. I plan to recommend this to EVERY reader I speak to for the next few weeks. ⭐️⭐️⭐️⭐️⭐️

Thank you to Macmillan Audio for this ALC. Wolf Worm will be available March 24th.
Profile Image for BookishlySonia.
210 reviews24 followers
March 21, 2026
Wolf Worm is soaked in creeping dread from the first pages. The atmosphere does so much of the work here, pressing in slowly, making isolation feel like a living thing that shapes every choice and every silence. The tension builds quietly, never rushing, and that restraint makes the horror land harder. In a deceptively simple setup, Kingfisher blends folklore, medical dread, and psychological unease into something both intimate and deeply unsettling. The pacing is sharp and economical, proving (yet again) how devastating Kingfisher can be with a novella-length canvas.

What I loved most is how character driven the story is without making it feel inward or small. The plot advances through moments of realization, hesitation, and resolve, rather than big shocks. The narration feels grounded and human, which makes the horror hit harder, this doesn’t feel like something happening to a “character,” but to a real person whose rational explanations slowly fail them.

Kindness and resilience matter in this world, even when they are overlooked or exploited. As always with Kingfisher, the real horror is human. The systems that dismiss, control, and harm are far more frightening than anything lurking in the dark.

This isn’t flashy or over-the-top horror; it’s smart, restrained, and brutally effective. If you enjoy folklore-infused body horror, medical creepiness, or stories that trust the reader to connect the dots, Wolf Worm is an absolute must-read.
Profile Image for Robin (Bridge Four).
1,972 reviews1,663 followers
March 22, 2026
This review was originally posted on Books of My Heart

Review copy was received from NetGalley. This does not affect my opinion of the book or the content of my review.

Sonia spent her life working with her father learning about plants and flowers and then painting them.  After his death left her practically penniless, she found that in 1899 there were not a lot of options for a female illustrator with a vast naturalist's knowledge.  When the reclusive Dr. Halder's invited her to illustrate his book of insects, it seemed like a godsend.

North Carolina is not what she expected.  It is full of crazy tales of blood drinkers in the woods and a mystery surrounding the woman who previously illustrated for Dr. Halder.  Maybe it is all the insects she is drawing, but the anxiety ridden voice in her head says that something in this place is as buggy as the entomologist she is working for.  Some of the animals are acting strangely, there is a scream from the woods sometimes.  The limited household seems to have knowledge of a history that Sonia thinks with answer all of her questions, if she just knew the right questions to ask.

T. Kingfisher is so good at what I'd call horror-lite.  There is the building tension to the story that is packaged in the building of characters, the place and the atmosphere of the community.   I was invested in Sonia finding the answers she was seeking and felt her anxiety at the situation as the voice in her head reminds her that something is off with this place and a few of the people in it.  The "ew" factor is real and if you are squirmy about bugs...well, I'm sorry, this is going to hurt.  Wolf Worm takes what a bot worm does to the next level of gross and it was pretty icky (yes that is the technical term) to begin with.  If you haven't seen what a bot worm can do there are videos on Youtube, so you can be as grossed out as me.  A bot fly will find a host, in North Carolina that is usually a squirrel, and lay its eggs in an open wound.  The eggs hatch in the host and the larva eat their way out.  But then T. Kingfisher takes that horror and dials it up to something ten times as heinous.

Wolf Worm was a wonderful look back in time to life post civil war in the South.  Racism was still a thing on a smaller scale and women were also second class citizens and had to be creative if they wanted to be independent and not follow the usually path of marriage.  It looks into the life of an illustrator creating the images for books.  I felt like I understood the people and the time the book was set in.  It also built a good mystery with horror elements in the insect/bug/vermin area that were truly horrifying.  For someone who doesn't really read horror (unless it is T. Kingfisher) it had so many other elements that drew me into the story and made me root for Sonia.

I loved the ending to this, it is was one of the better wrap ups to a standalone story I've read.  I found it so satisfying.  If, like me, at the end you are thinking to yourself 'How does someone even come up with an idea like this.' T. Kingfisher explains in the afterword her inspiration for this story.  Normally I don't read these, however I was so curious, I had to know.  I now have an intense fear of both bot worms and screw worms that I can attribute directly to this story.

Narration:
Performance: ★★★★★
Character Separation: ★★★★★
Diction: ★★★★★
Pacing/Flow: ★★★★
Sound Effects: none

I am very familiar with Mary Robinette Kowal's voice.  She has narrated 19 books in another series I've listened to and as soon as I started Wolf Worm I settled into an old friend telling me a story.  The voices changed but the cadence and overall performance was done so well.  She is a natural story teller and made me like and connect with Sonia, more than I probably would have if reading this book with my eyes.  I was able to listen at my usual 1.5x speed.

Listen to a clip: HERE
Profile Image for lookmairead.
856 reviews
March 8, 2026
Kingfisher, you’re making me paranoid about nature. *shakes fist* But also, more please. 🤭😅

I’m trying not feel itchy overthinking this book, but (wo)man, I Iove Kingfisher’s voice. It’s weird but awesome. It feels like a friend telling you the most absurd story. 🥰

I feel like Kingfisher knows how to keep us on our toes. I like that no matter what she drags us through- her endings usually have justice and leave us on a hopeful note.

This gave me more A House with Good Bones vibes but a little creepier.

Definitely recommend this one with your Halloween-ish mood reading vibes.

4/5


Thank you @netgalley & Tor Publishing Group for this ARC.

Publish Date 24 March 2026
Profile Image for phoenix *ੈ✩‧₊˚.
177 reviews8 followers
Did not finish
March 8, 2026
dnf @40%


First of, the writing style is very beautiful, and I really enjoyed that part.

Unfortunately, I was bored to death. I'm sure there is going to happen something super disturbing and thrilling, but I just don't want to keep reading anymore. The book didn't hook me and I'm just not interested in the plot at all.


This book comes out on March 24th, 2026.

Thanks to the publisher, the author, and NetGalley for providing the ARC in exchange for an honest review.
Profile Image for Jodie.
111 reviews18 followers
Review of advance copy received from Publisher
January 18, 2026
Wolf Worm is a Southern Gothic horror novel blending historical fiction with (insect infested) body horror.

T.Kingfisher is one of my auto buy authors, so I'm not surprised I flew through this! Their writing always draws me in and makes me reluctant to put the book down. Not only that, but they also write the best fully fleshed characters. Main characters you'll root for, villains you want to find out more about and side characters who feel like they have their own rich background stories.

And this book is obviously no different. It's creepy and tense with excellent body horror that keeps you squirming while wanting to find out what happens next. There's some clever twists, and for a while, you won't really know where the story is going.

The only reason I'm rating it 4 stars is because it read a little too similar to Snakeeater. We have a weird little town full of secrets which the FMC is slowly uncovering. Here it's just insects instead of the snakeeater.

Still definitely recommend this one to all fans of gothic horror and T.Kingfisher's writing. Just be careful if you're squeamish when it comes to insects.
Profile Image for Azhar.
409 reviews36 followers
December 7, 2025
brother….ew.

this was nearly as disgusting as nick cutter’s troop.

ngl i was skeptical about this because the last few t. kingfisher books i’ve read haven’t really been the best. but this one? blew me away. the body horror literally made my skin crawl (reading about being trapped in that fucking shed in the dark gave me hives) and i flew through the pages, the story was pretty damn fascinating.

thanking the publishers & netgalley for the ARC.
Profile Image for ⊹ Amy ⊹.
116 reviews39 followers
November 9, 2025
Wolf Worm is a historical gothic novella that follows Sonia Wilson in her new position as a scientific illustrator. Her days consist of observing and drawing insects for her strange and secretive employer, but things take a dark turn when she discovers that his fascination with parasitic maggots hides something far more unsettling.

What I really like about Wolf Worm is the balance between grotesque scenes paired with humor. The writing is very descriptive, and since the main focus is insects, larvae and such, it makes for some very squeamish scenes. Additionally, most of the characters are quite likable and the story has some nice twists.

But the reason why I couldn't give it a higher rating is because the first half felt really slow. I had to push through repetitive scenes and monologues where Sonia just theorizes what's going on, sketches, and theorizes again. It's not until the halfway point that the story actually begins to move. For such a short novella, the pacing made it feel longer than it should have. I wouldn't have minded so much if the first half was at least filled with more interesting nature or insect descriptions, considering that we're following naturalists.

But with all said, T. Kingfisher continues being one of my favorite authors, so I'll always be excited to read her latest horror releases. Many thanks to NetGalley for providing me with an ARC in exchange for my honest review. 3.5 ⭑.ᐟ
Profile Image for Siobhan.
287 reviews57 followers
Review of advance copy received from Netgalley
March 19, 2026
My favourite Kingfisher yet I swear to god!!

I love it when Kingfisher does horror. I love it when she does everything, but I especially love her creepy, unsettling, think about that at night, horrors.

Wolf Worm is a historical body horror. Never thought that would be on my agenda but here we are. The body horror is fantastic. My skin was crawling. I'm now terrified of flies.

The plot was wonderful to me too. In the late 1800s, Sonia Wilson takes a live in job illustrating insects for a naturalist's book. It's unclear what happened to the previous illustrator whose room Sonia inherits. And the locals believe there are devils or blood thieves in the woods.

If you loved The Twisted Ones and A House with Good Bones, this is for you!

Thank you to Netgalley for an arc in exchange for an honest review.
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