Mortal Vengeance: A Grim Tale A Caribbean Gothic Prequel to Mortal Vengeance
The halls of Excelsior Academy gleam with marble and stained glass, but behind the polished façade lies something far darker. Discipline is worshiped, individuality is crushed, and silence is the only currency that keeps you safe.
Seventeen-year-old Julián Díaz already feels the weight of that silence pressing down on him—Catholic guilt, family sacrifice, and a cruel teacher determined to break him piece by piece. But when whispers of the Grim Cojuelo—a figure torn from Dominican carnival myth—begin to creep into his waking life, Julián realizes his guilt may have summoned more than shame. It may have called forth a hunter.
Set eighteen months before the events of Mortal Vengeance, this chilling prequel reveals the origins of the mask, the scythe, and the darkness that will one day stalk Excelsior. Here, cruelty wears the face of authority, survival demands compromise, and every secret brings you closer to the inevitable.
Dread replaces mystery. Every betrayal feels preordained. Because once the Grim Cojuelo takes shape, the question is no longer who the killer will be—only how soon he’ll collect.
Perfect for fans of Scream, The Secret History, and Caribbean folklore, Mortal A Grim Tale is a psychological, supernatural thriller that exposes the cost of silence, the brutality of institutions, and the birth of a new horror icon.
Mortal Vengeance takes us into the world of a prep school in Santo Domingo, where a demented teacher rules over her students with an iron fist. When the students have finally had enough, they plan an act of revenge. Shortly after, a series of brutal and unexplained deaths follows. A shadowy figure known as El Grim Cojuelo is the culprit—but is this a supernatural figure or a human one? Who can trust whom? And will they survive to uncover the truth?
Mortal Vengeance is a fun thriller. The author has said in interviews that he was inspired by Scream and I Know What You Did Last Summer, both of which fit the tone of Mortal Vengeance. As the book goes on, the friends are revealed to be hiding secrets from each other, adding to the drama.
Since the action takes place in the Dominican Republic, there are cultural differences. Wealth, class, and gender differences pervade the mystery in Mortal Vengeance, as well as the sinister villain, El Grim Cojuelo. A cross between the Grim Reaper and Dominican folklore, I was intrigued by this menacing figure who silently slaughters. De la Rocha plays off the culture of silence that is common in the Dominican Republic, which is why El Grim Cojuelo doesn’t speak. As a bad guy, El Grim Cojuelo is terrifying, and I was filled with dread every time he appeared.
While the theme and plot of Mortal Vengeance work well, it’s apparent this is a debut novel. In the first half of the novel, De la Rocha relies a bit heavily on metaphors and similes, taking away from the power of those that really land. He eases up on the figurative language in the last half, allowing the times when he does utilize it to shine. De la Rocha has a poet’s voice and provides some truly stunning imagery for readers.
There were some struggles with pacing, as well. As soon as one blood-curdling murder happens, El Grim Cojuelo strikes again almost immediately. Neither readers nor characters are given enough time to process what just happened. As a reader, I would have preferred some processing time before the next “grim” event.
As a storyteller, De la Rocha is a fresh new voice. He creates a sinister world with a Caribbean twist, and with these sneaky twists and a new monster, Mortal Vengeance is an ideal read for spooky season. In the foreboding halls of the premier Excelsior Academy, guilt is a weapon, shame can be lethal, and mockery is the daily fare. For the young high school students trying to make their way through life, nothing is as simple as math homework or turning in a paper. The math teacher is a sadistic nun who revels in corporal punishment with a good mix of mockery and public humiliation. Padre Ángel is a child molester and abuser, hiding his crimes beneath holy robes and the guise of ‘purification.’ Padre Ignacio won’t physically hurt the children in his care, but his silence atop his knowledge of the dark goings-on is just as damning. Everyone is a sinner. Many are abusers. And many, like seventeen-year-old Julián Díaz, are the victims.
In Mortal Vengeance: A Grim Tale by Alejandro Torres De la Rocha, Julián is a scholarship student, the son of two hardworking parents who remind him often of the sacrifices they’ve made to put him in the prestigious school. The pressure they place on him and the constant berating have him spiraling. His best friend, Lucía, is brave and defiant, a light in the darkness – but perhaps not enough light to pull Julián out of his own darkness. He is obsessed with the Grim Cojuelo, a Dominican carnival myth with horns, a scythe, and a hunter’s fixation. The terrifying story isn’t just a story for Julián anymore. He sees him. He hears him. And he fears him.
This ‘grim tale’ is the prequel to Torres De la Rocha’s Mortal Vengeance, explaining the “howdunnit” behind the “whodunnit” of the Grim Cojuelo killings that will take place over a year later. As the dated chapter headings tick towards the killing spree, the story’s tension rises like a flood. Which of these students’ psyches will snap under the struggle and abuse? Which of the nuns and priests will be the one to push someone over a dark edge?
As Lucía navigates dates with bullies masquerading as gentlemen, high-stakes debate, and managing her quickly spiraling best friend, she longs for comfort. For camaraderie. “Some girls,” she thinks bitterly, “Get flowers. Some girls get backup.” As she unravels the madness surrounding herself, her friend, and the entirety of Excelsior, her resolve to fight the system only intensifies. And it earns her enemies.
Told in alternating points of view through beautiful, incisive prose, Mortal Vengeance: A Grim Tale will take readers along on an excruciating journey with an undeniably tragic end. The students’ and teachers’ bravery, mishaps, courage, and sins convalesce in a tornado of human emotion that will leave the reader on the edge of their seat.
Torres De la Rocha’s prequel to Mortal Vengeance fuses dark academia, Dominican folklore, and psychological horror into a brutal portrait of institutional cruelty. The halls of Excelsior Academy gleam with marble and stained glass, but beneath the polished façade lies something far darker. Discipline is worshiped, individuality is punished, and silence is the only currency that keeps anyone safe. Seventeen-year-old Julián Díaz struggles beneath Catholic guilt, family sacrifice, and relentless humiliation from the teachers meant to guide him. But when visions of the Grim Cojuelo begin haunting him, Julián realizes the monster stalking Excelsior may not be born of folklore alone. It may be something the school itself created.
Torres De la Rocha transforms institutional cruelty into psychological horror with unsettling precision: he builds Excelsior Academy like a cathedral of repression, where authority figures weaponize guilt, humiliation, and religion. The novel’s greatest strength is Julián himself—a painfully believable protagonist whose slow emotional collapse feels inevitable. Dominican folklore is woven naturally into the narrative, turning the Grim Cojuelo into both a supernatural threat and a symbol of inherited shame, rage, and social violence. Fans of dark academia, psychological horror, and folklore-driven thrillers will find a brutal, emotionally charged descent into the making of a monster.
I have to admit, when I first started reading this book and saw the chapter titles I thought it was a trick to get my attention. Every single chapter title is a saying about the devil. I was wrong about this book at first impression. The author, Torres De la Rocha uses these sayings as a way to build something bigger and more important. This book is a story about how people become monsters because of the systems that are supposed to keep us safe.
What really got to me was the character Julián. It was not the plot that was around him. How he felt about what he had done. There is a line in the book where he talks about feeling guilty and how it's worse than any bad thing that can happen to you. He says it is like a birthright for people who're devout Catholics, something i can actually relate to as a confidant to many friends who are practicing Catholics. The author shows how Julián is suffering by building up the feelings of guilt and shame little by little. We see this when his teacher, Profesora Lourdes humiliates him in front of everyone and when his family has to give up things because of what he did.
Profesora Lourdes is a scary character but not because she is supernatural. She is scary because she is like people we know in life. The scene where she follows Julián into the hallway and sings a song to him while the other kids record it on their phones is really disturbing. This scene works because the author understands that when people in power abuse others it does not need to be supernatural to be bad. It just needs people to see it and do nothing.
I also liked how the author worked with the characters. The ethics class that Padre Ignacio teaches is like the backbone of the story. This book trusts you the reader to handle ideas and does not try to simplify them. If you read this book you will be rewarded for your effort. You should really read this book if you think that the scariest things are not ghosts or monsters but the systems and people that can hurt us in our lives.
Okay, so I had no idea this was a prequel when I started. I found that out early on and kept reading anyway. The story is set at a fancy religious school. The School (named Excelsior Academy) looks perfect from outside but inside it is full of secrets, abuse, and people using power the wrong way. The author did a great job in handling such a sensitive storyline. The book shows how bad things keep piling up inside the school until everything explodes. The main character carries a lot of guilt. When I was reading, I realized the author made sure the religious pressure on the main character feels very real. I felt uncomfortable reading some parts and I think that was the point. The scariest part for me was the confession ledger. The idea that someone is collecting people's secrets and using them as control. itself is very creepy. Some middle chapters slow down and repeat similar ideas. There is a lot of pain in this book and after a while it does feel like too much. But the author has made sure every character feels like real people.
This is not a light read. The book deals with abuse, manipulation, and dark themes. If you like psychological thrillers with dark secrets, this one delivers.
Mortal Vengeance: A Grim Tale, by Alejandro Torres De la Rocha, is a psychological thriller that works like an origin story: it follows a 17-year-old senior at the Jesuit-run Excelsior Academy, as the school’s cruelty, silence, and “character-building” discipline quietly shape the conditions for the future Grim Cojuelo killings. It’s framed as the “howdunit” prequel to another book in the same universe, tracing how institutional rot and personal guilt turn a Dominican folklore figure, the limping devil reimagined as a hunter, into something inevitable.
I really enjoyed the cinematic writing. The book opens with a staged, almost spoken-word setup, with a narrator and the killer stepping in like voices in a dark theater, and it keeps that heightened, performative feel even in ordinary moments. The school itself is described with a kind of glossy dread: stained glass, marble, crucifixes everywhere, and beauty that feels like a trap. Sometimes the language is intense, almost daring you to look away. It works, especially when it’s tied to sensory detail and not just mood. Other times, it can feel a little crowded with emphasis, like the book underlining its own points. Still, the voice commits. It wants you inside Julián’s head, where guilt is not abstract; it’s a pressure in the chest.
The author’s big choice, and I mean this in a good way, is to make the horror feel system-made. The most frightening scenes are not supernatural. They’re social. A teacher humiliates a student in public, classmates freeze, phones come out, and nobody with power stops it. Then you get a philosophy class where a priest asks, calmly, if it’s ever okay to lie, and suddenly the book is talking about survival, complicity, and the cost of telling the truth in a place that punishes it. That’s where the psychological thriller genre really clicks for me: it’s less about jump scares and more about watching a closed world tighten its rules until someone breaks. If you like school-set dread where the building itself feels like a character, it reminded me at times of the slow-burn pressure and moral rot in Donna Tartt's The Secret History, and the “this place is shaping you” inevitability you get in Stephen King's novel Carrie, even though the voice and cultural lens here are very much its own.
I’d recommend A Grim Tale to readers who want their thriller to have teeth, especially people interested in stories about institutions, religious power, and how silence gets enforced. One note, it does not tiptoe around heavy material, including trauma and grooming, so you really have to be in the right headspace. But if you’re drawn to psychological thrillers where the scariest thing is watching a system teach people to look away, you’ll appreciate what this book is doing, and how patiently it builds the sense that the monster is being assembled in plain sight.
The author has created an incredible story, Mortal A Grim Tale is more than a prequel to Mortal Vengeance. Mortal Vengeance is full of excitement, but Mortal A Grim Tale is full of substance, and substance is where the true horror lives. When we first enter into Excelsior Academy we see beauty through the eye of a child – the marble floors, the stained glass windows – everything looks so beautiful. But, beneath the surface of this beauty lies a dark world filled with oppression and fear. There is no room at Excelsior Academy for individuality or creativity. In fact, the only way to survive there is to remain silent and follow the rules to the letter.
Julián is a very complex person, he is a product of his environment. He carries the darkness inside. When Julián meets the Grim Cojuelo, a creature from the folklore of the Dominican Carnival, his world is turned upside down. He begins to realize that his guilt could be real, and the monster that he sees before him is out to hunt him.
What makes this story even more compelling is how the author incorporates Caribbean folklore into the story. The Grim Cojuelo is not just a monster, he is a reflection of the dysfunction in both the school and in Julián's life. The line between the supernatural and reality become blurred, making the horror of this story far more terrifying than any jump scare from a ghost.
I think that one of the best aspects of this story is the relatability of Julián. As the reader follows him on his journey, you find yourself wanting to scream "come back to who you are!" as he tries to live up to what everyone else wants him to be, rather than staying true to himself. By the time that you finish the story, you understand completely why the mask and scythe in Mortal Vengeance is such a big deal. These symbols represent what happens when you allow silence to dictate your life for too long.
Overall, Mortal A Grim Tale is a phenomenal read. It is a Caribbean Gothic tale that will leave you haunted long after you turn the final page. If you enjoy horror/mystery/thrillers that make you think about deeper issues, then Mortal A Grim Tale is definitely for you.
Mortal A Grim Tale is a prequel to Mortal Vengeance. It's a tale which is full of excitement, horror and thrill that makes us think about deeper issues. It takes us into the world of Excelsior Academy in Santo Domingo where beauty lies through the eye of a child but beneath is a world full of oppression. As a teacher rules over her students with an iron fist, leaving no room for individuality or creativity. Making the only way to survive is to remain silent and follow the rules to the letter. Julián a seventeen-year-old a reflection of his environment,starts to feel the weight of the silence and pressure and he carries the darkness on the inside. But then Julián meets a creature, Grim Cojuelo, and his world turns upside down. He then begin to realize his guilt and that the creature is set to hunt him down. Although His best friend, Lucía, is brave but perhaps not strong enough to pull Julián out of his own darkness. As he becomes obsessed with the creature to the point he sees him, hears him and even fears him. This story is a blend of the supernatural and reality joined , making the horror of the story very relatable and terrifying. Making us realize the connection between the spiritual and physical world. It was an amazing read and one full of lessons, horror and courage. I definitely recommend the book
This is one of the most thought-provoking and engaging books I have ever read. I am impressed with the major disclosure on the importance of emotional and mental health among the youth in society, through the story of Julian Diaz. This book is rich in humor, tragedy, mischief, horror, plot twists, drama, revenge, and suspense that add gravity to the frolicky nature yet staunch religious upbringing of many of the teenage characters. It brings vivid memories to readers such as myself, who have childhood backgrounds in Catholic educational institutions similar to Excelsior. I truly love the writing style of the author; it is so poetic and fun to read.
Readers are in for a shocking and incredible reading experience filled with twists and turns that will tug at their emotional heartstrings and keep them glued to their seats till the very end. I recommend this book to adult readers who are interested in tales of religious philosophy, world history, folklore, and traumatic episodes.