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Nightmare Reef: A Deep Sea Thriller
The ocean is vast. The danger is ancient. And nowhere is safe.
For the Wagner family, sailing across the Pacific was meant to be the adventure of a lifetime. But beneath their ageing yacht, Nauti Buoy, something stirs—something thought extinct for millions of years. Then the nightmare begins. Hunted by plesiosaurs—ferocious predators from a forgotten age—the Wagners are thrust into a relentless fight for survival.
From award-winning author Deborah Sheldon, Nightmare Reef is a harrowing tale of one family’s battle to the death against nature’s brutality.
For the Wagner family, sailing across the Pacific was meant to be the adventure of a lifetime. But beneath their ageing yacht, Nauti Buoy, something stirs—something thought extinct for millions of years. Then the nightmare begins. Hunted by plesiosaurs—ferocious predators from a forgotten age—the Wagners are thrust into a relentless fight for survival.
From award-winning author Deborah Sheldon, Nightmare Reef is a harrowing tale of one family’s battle to the death against nature’s brutality.
- GenresHorror
199 pages, Kindle Edition
Published September 1, 2025
6 people are currently reading
13 people want to read
About the author
Deborah Sheldon
79 books281 followersI'm a multi-award-winning author and anthology editor from Melbourne, Australia. I write poetry, short stories, novelettes, novellas and novels across the darker spectrum of horror, crime and noir. My latest titles are the novel Nightmare Reef and the poetry collection The Broonie and Other Dark Poems.
My award-winning titles include the novella Redhead Town and the collection Perfect Little Stitches and Other Stories. My award-nominated titles include the novels Nightmare Reef, Bodily Harm, Cretaceous Canyon, Body Farm Z, Contrition and Devil Dragon; the novella Thylacines; and the collections Figments and Fragments: Dark Stories and Liminal Spaces: Horror Stories.
My short fiction has appeared in many well-respected magazines, been shortlisted for numerous awards, translated, and included in various 'best of' anthologies.
I've won the Australasian Shadows 'Best Edited Work' Award three times: for Midnight Echo 14, and for the anthologies I conceived and edited, Spawn: Weird Horror Tales About Pregnancy, Birth and Babies, and Killer Creatures Down Under: Horror Stories with Bite.
Other credits include TV scripts such as NEIGHBOURS, feature articles, non-fiction books published by Reed Books and Random House, stage plays, award-nominated poetry, and award-winning medical writing including Better Health Channel.
My award-winning titles include the novella Redhead Town and the collection Perfect Little Stitches and Other Stories. My award-nominated titles include the novels Nightmare Reef, Bodily Harm, Cretaceous Canyon, Body Farm Z, Contrition and Devil Dragon; the novella Thylacines; and the collections Figments and Fragments: Dark Stories and Liminal Spaces: Horror Stories.
My short fiction has appeared in many well-respected magazines, been shortlisted for numerous awards, translated, and included in various 'best of' anthologies.
I've won the Australasian Shadows 'Best Edited Work' Award three times: for Midnight Echo 14, and for the anthologies I conceived and edited, Spawn: Weird Horror Tales About Pregnancy, Birth and Babies, and Killer Creatures Down Under: Horror Stories with Bite.
Other credits include TV scripts such as NEIGHBOURS, feature articles, non-fiction books published by Reed Books and Random House, stage plays, award-nominated poetry, and award-winning medical writing including Better Health Channel.
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Displaying 1 - 11 of 11 reviews
September 11, 2025
Prepare for the unexpected in Nightmare Reef. When the Wagner family buy a yacht in Australia and set sail for San Francisco, their holiday of a lifetime soon becomes a brutal battle between life and death. As the tension builds, the sense of terror and dread become almost overwhelming, and the book becomes unputdownable. The unpredictability of the Pacific Ocean, the claustrophobic confinement of the boat, and the mental and physical strain and tensions within the family are palpable. Not to mention the manifest threat and horror of prehistoric predators. This book is a gripping read. Highly recommended.
March 17, 2026
If you think the open ocean is peaceful, Nightmare Reef will make you think again.
Deborah Sheldon drops readers straight into the uneasy calm of a family sailing adventure that quickly spirals into something far more sinister. The Wagner family sets out across the Pacific aboard their ageing yacht, the Nauti Buoy, expecting memories and bonding, not terror. But beneath them, something ancient awakens… and it’s very, very hungry.
What follows is a relentless, pulse-pounding survival story as the family finds themselves hunted by creatures that should not exist, plesiosaurs, resurrected from extinction and every bit as deadly as you’d imagine. Sheldon does an incredible job of turning the vastness of the ocean into something claustrophobic and inescapable. There’s nowhere to run, nowhere to hide, just water, fear, and the constant threat circling below.
I’ll be honest, this isn’t my usual genre. I don’t typically gravitate toward creature thrillers or prehistoric horror. But this book completely hooked me. The pacing is sharp, the tension never lets up, and I found myself unable to put it down. Every chapter ends with that “just one more page” feeling… until suddenly, you’re at the end.
What really stood out was how grounded the story feels despite its wild premise. The family dynamics, the desperation, the sheer will to survive, it all makes the horror hit harder.
By the time I finished, I wasn’t just impressed, I was converted. I’ll definitely be seeking out more of Deborah Sheldon’s work.
Deborah Sheldon drops readers straight into the uneasy calm of a family sailing adventure that quickly spirals into something far more sinister. The Wagner family sets out across the Pacific aboard their ageing yacht, the Nauti Buoy, expecting memories and bonding, not terror. But beneath them, something ancient awakens… and it’s very, very hungry.
What follows is a relentless, pulse-pounding survival story as the family finds themselves hunted by creatures that should not exist, plesiosaurs, resurrected from extinction and every bit as deadly as you’d imagine. Sheldon does an incredible job of turning the vastness of the ocean into something claustrophobic and inescapable. There’s nowhere to run, nowhere to hide, just water, fear, and the constant threat circling below.
I’ll be honest, this isn’t my usual genre. I don’t typically gravitate toward creature thrillers or prehistoric horror. But this book completely hooked me. The pacing is sharp, the tension never lets up, and I found myself unable to put it down. Every chapter ends with that “just one more page” feeling… until suddenly, you’re at the end.
What really stood out was how grounded the story feels despite its wild premise. The family dynamics, the desperation, the sheer will to survive, it all makes the horror hit harder.
By the time I finished, I wasn’t just impressed, I was converted. I’ll definitely be seeking out more of Deborah Sheldon’s work.
October 12, 2025
Turtles and sharks and dinosaurs?
*George Takei voice*: oh my…
Deborah (probably): “You know what? CRETACEOUS CANYON wasn’t horrifying enough. I should have told part of the story from the dinosaur’s perspective…”
Me, reading NIGHTMARE REEF: “Oooh, a shipwreck AND prehistoric drama?”
So I definitely feel like I should mention that this book might not be for animal lovers, for all the best reasons. Deb doesn’t hold back on letting the dinosaurs be dinosaurs, and it leads to some brutal, highly emotional moments.
NIGHTMARE reef, in Sheldon’s signature style, is a slow burn until it isn’t. Despite being limited in setting to the seas around a small sandbar, she crafts a story that seems to fill a much larger world, a tale of desperation and survival while dealing with a threat from long ago.
A fantastic read!
*George Takei voice*: oh my…
Deborah (probably): “You know what? CRETACEOUS CANYON wasn’t horrifying enough. I should have told part of the story from the dinosaur’s perspective…”
Me, reading NIGHTMARE REEF: “Oooh, a shipwreck AND prehistoric drama?”
So I definitely feel like I should mention that this book might not be for animal lovers, for all the best reasons. Deb doesn’t hold back on letting the dinosaurs be dinosaurs, and it leads to some brutal, highly emotional moments.
NIGHTMARE reef, in Sheldon’s signature style, is a slow burn until it isn’t. Despite being limited in setting to the seas around a small sandbar, she crafts a story that seems to fill a much larger world, a tale of desperation and survival while dealing with a threat from long ago.
A fantastic read!
September 13, 2025
It’s no secret that I’m a fan of Deb Sheldon’s. One thing that always surprises me about her writing is the incredible diversity, from monsters to human frailty to psychological thrillers to natural phenomena and more. Nightmare Reef covers it all: terrifying monsters, a wild cyclone, flawed people in a confined space, personal valour. This book is a roller-coaster journey through fear, anger, self-examination and triumph for the characters, and for me as a reader. In the end, I found myself wondering if I would have what it takes to survive this ‘nightmare reef’?
October 27, 2025
I think this is one of Deborah's best stories ever. So many unexpected twists, totally unpredictable. I had no idea how it was going to turn out. I really loved the ending. Get this book and read it now!
September 24, 2025
Spoiler-Free Review!
Deborah Sheldon has done it again! Every time I think I have a favorite creature story that she’s written, she ups the ante and gives me another thrilling book! I sat down to start reading this book and ended up finishing it the same day. I was exhausted afterward from all of the adrenaline-inducing excitement!
Once you get introduced to the Wagners, prepare yourself for no-holds-barred suspense and terror as the family of five (and their dog!) embarks on a yearlong sailing excursion from Melbourne to San Francisco aboard the Nauti Buoy. You’ll experience the journey through the eyes of Marique, wife and mother of three. Though her self-confidence has been leeched out of her by her family since she was a young girl, and continues to be through her marriage, she finds a way to reconnect with herself and her inner strength on the trip.
There’s a lot of layering in this book. Of course, it’s no surprise if you look at the title and the cover, some monster madness that’s going to go down. Sheldon is clever with her braiding of POVs throughout the book, and I found the dueling storylines to be highly enjoyable and surprising.
Sheldon deftly adds in an emotional backbone to the story with themes of fatherhood, motherhood, and the double standards that can wreak havoc on relationships. This creates realistic characters and situations that readers can relate to in between the moments of heart-thumping terror. There is interesting commentary and food for thought about life and the changes that can happen to anyone, especially those relating to family dynamics and social etiquette in today’s world.
This story legitimately had me holding my breath and clenching my muscles. There is palpable danger and fear. I felt the fear of a parent desperate to protect my loved ones, the overwhelming and suffocating fear of drowning, and a claustrophobic fear gnawing at my gut as I imagined being below deck on a boat tossed around on the unforgiving open sea. The descriptions and well-placed (and plentiful) moments of suspense had me on edge the majority of the book. There is an intensity that brought the book to life for me, and it had my adrenaline flowing.
One of the things I enjoyed was experiencing so many “what now?!?!?” moments at every turn. Sheldon doesn’t let up, and it made me wonder what I would do if I were in Marique’s place. This book is intense, which is one of the reasons the story is so fantastic. Unlike any other sea creature story I’ve read to date, Nightmare Reef’s danger is relentless.
This book absolutely mesmerized me, causing my breath to hitch as I hungrily turned pages to learn what would happen in the end. It’s a book I wish I could read once more with the ability to experience it again for the first time.
So join me. Climb aboard the Nauti Buoy and explore the unknown—the cold, dark waters where monsters lurk above and beneath the surface. You might just learn a few things about yourself and what you’d be willing to do to survive.
https://www.robinknabel.com/review-bl... - FOR FULL REVIEW
Deborah Sheldon has done it again! Every time I think I have a favorite creature story that she’s written, she ups the ante and gives me another thrilling book! I sat down to start reading this book and ended up finishing it the same day. I was exhausted afterward from all of the adrenaline-inducing excitement!
Once you get introduced to the Wagners, prepare yourself for no-holds-barred suspense and terror as the family of five (and their dog!) embarks on a yearlong sailing excursion from Melbourne to San Francisco aboard the Nauti Buoy. You’ll experience the journey through the eyes of Marique, wife and mother of three. Though her self-confidence has been leeched out of her by her family since she was a young girl, and continues to be through her marriage, she finds a way to reconnect with herself and her inner strength on the trip.
There’s a lot of layering in this book. Of course, it’s no surprise if you look at the title and the cover, some monster madness that’s going to go down. Sheldon is clever with her braiding of POVs throughout the book, and I found the dueling storylines to be highly enjoyable and surprising.
Sheldon deftly adds in an emotional backbone to the story with themes of fatherhood, motherhood, and the double standards that can wreak havoc on relationships. This creates realistic characters and situations that readers can relate to in between the moments of heart-thumping terror. There is interesting commentary and food for thought about life and the changes that can happen to anyone, especially those relating to family dynamics and social etiquette in today’s world.
This story legitimately had me holding my breath and clenching my muscles. There is palpable danger and fear. I felt the fear of a parent desperate to protect my loved ones, the overwhelming and suffocating fear of drowning, and a claustrophobic fear gnawing at my gut as I imagined being below deck on a boat tossed around on the unforgiving open sea. The descriptions and well-placed (and plentiful) moments of suspense had me on edge the majority of the book. There is an intensity that brought the book to life for me, and it had my adrenaline flowing.
One of the things I enjoyed was experiencing so many “what now?!?!?” moments at every turn. Sheldon doesn’t let up, and it made me wonder what I would do if I were in Marique’s place. This book is intense, which is one of the reasons the story is so fantastic. Unlike any other sea creature story I’ve read to date, Nightmare Reef’s danger is relentless.
This book absolutely mesmerized me, causing my breath to hitch as I hungrily turned pages to learn what would happen in the end. It’s a book I wish I could read once more with the ability to experience it again for the first time.
So join me. Climb aboard the Nauti Buoy and explore the unknown—the cold, dark waters where monsters lurk above and beneath the surface. You might just learn a few things about yourself and what you’d be willing to do to survive.
https://www.robinknabel.com/review-bl... - FOR FULL REVIEW
March 2, 2026
I love a good thriller, and a "monster thriller" is right up my alley.
It's the tale of the Wagner family who decide to cross the Pacific from Australia to San Francisco on a small yacht. Well, in truth, it's just the husband's dream and he's dragging his wife, their three kids and their dog along for the ride.
The story is told from the wife's perspective and it starts out as most creature thrillers do, pretty calmly as we get to know her, her three children (Beau, Haley and Aiden) and their dog.
We also get to know the other POV...that of the Plesiosaur (specifically the green one) who thinks the Wagner family would be as good as a banana split with extra toppings.
When the action begins (as a storm hits), things go downhill very fast for the Wagners, and I found it to be an edge of the seat, can't put it down type thriller.
My only dislike in the story were some of the deaths (small children and animal/pet deaths bother me, so if they bother you too, you may want to skip this one.) But I only cut off half a star for that (so it still came out to five).
All in all though, an excellently told thriller. Especially with us getting to know the "creature" up close and personal.
It's the tale of the Wagner family who decide to cross the Pacific from Australia to San Francisco on a small yacht. Well, in truth, it's just the husband's dream and he's dragging his wife, their three kids and their dog along for the ride.
The story is told from the wife's perspective and it starts out as most creature thrillers do, pretty calmly as we get to know her, her three children (Beau, Haley and Aiden) and their dog.
We also get to know the other POV...that of the Plesiosaur (specifically the green one) who thinks the Wagner family would be as good as a banana split with extra toppings.
When the action begins (as a storm hits), things go downhill very fast for the Wagners, and I found it to be an edge of the seat, can't put it down type thriller.
My only dislike in the story were some of the deaths (small children and animal/pet deaths bother me, so if they bother you too, you may want to skip this one.) But I only cut off half a star for that (so it still came out to five).
All in all though, an excellently told thriller. Especially with us getting to know the "creature" up close and personal.
This entire review has been hidden because of spoilers.
February 13, 2026
The adventure begins with the Wagners setting out from Port Phillip Bay, Australia, headed for San Francisco, but if you think this is a tale of smooth sailing, you don't know Deborah Sheldon... Oh, and anyway, the title and cover should have been enough to warn you. ;) A deep-sea thriller indeed! In "Nightmare Reef", Deborah Sheldon does what she does best, edge-of-your-seat (or rather up-against-the-gunwale) suspense, jam-packed action, and tasty morsels (huge chunks) of horror. The prose evokes the Pacific at its most violent, and at times it's as though Deborah is actually summoning the storm with her words. Adventure on the high seas, complete with wild weather, and prehistoric creatures with an appetite. The ending was spot on too, with a moment of reflection about would could have been, because the sea never forgives even the smallest of mistakes.
October 18, 2025
I have to say that at the beginning, and for quite a ways through the book, I didn't like the mom. I know she was damaged, going from a dominating father to a dominating husband and it made her into a submissive woman. It does happen in real life unfortunately. In this book, she is forced to stand up for herself and her kids, but it takes a while and she never does get too confident in herself.. I took no enjoyment in reading about that part. I expected a sea monster story, and I did get that in spades though, and by the end of the book, I was happy enough. The monster's story was quite interesting too.
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September 22, 2025Something hungry this way comes
Full review at MonsterBookClub
Full review at MonsterBookClub
February 25, 2026
Another great book by Deborah Sheldon! I was on the edge of my seat the whole time. No spoilers, but I loved hating some of the characters!!!!! Great read!
Displaying 1 - 11 of 11 reviews