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Little Brother
Twelve-year-old Leslie Adams is found covered in blood, standing over the lifeless body of a boy named Tommy. Everyone said she did it—after all, she was the only one there when he died. The most terrifying part? Leslie doesn’t remember a thing.
Years later, she still can’t escape the shadow of that day. Now in college, Leslie is desperate for a fresh start... until the blackouts return. Night after night, she wakes from these fugue states with fresh bruises and unexplained cuts on her skin. Doctors insist she’s self-harming—coping with repressed trauma. But deep down, Leslie knows something far more sinister is at play.
Disturbing visions begin to haunt echoes of childish laughter in empty rooms, the silhouette of a familiar little boy lingering just out of sight. Leslie fears the horror that claimed Tommy never really left. With each missing moment, the darkness inside her grows—stronger, bolder.
And when the truth finally claws its way to the surface, Leslie must confront a reality more terrifying than any childhood nightmare. Because the real horror isn’t what she might have done back then... it’s what’s been hiding inside her.
Years later, she still can’t escape the shadow of that day. Now in college, Leslie is desperate for a fresh start... until the blackouts return. Night after night, she wakes from these fugue states with fresh bruises and unexplained cuts on her skin. Doctors insist she’s self-harming—coping with repressed trauma. But deep down, Leslie knows something far more sinister is at play.
Disturbing visions begin to haunt echoes of childish laughter in empty rooms, the silhouette of a familiar little boy lingering just out of sight. Leslie fears the horror that claimed Tommy never really left. With each missing moment, the darkness inside her grows—stronger, bolder.
And when the truth finally claws its way to the surface, Leslie must confront a reality more terrifying than any childhood nightmare. Because the real horror isn’t what she might have done back then... it’s what’s been hiding inside her.
- GenresHorror
178 pages, Kindle Edition
Published October 31, 2024
About the author
Adam Cosco
9 books86 followersAdam Cosco is an award-winning author and filmmaker whose work dives deep into the shadows of the human psyche. A graduate of the prestigious American Film Institute, Adam cut his teeth in Hollywood before turning his focus to novels—crafting stories that blend horror, psychological suspense, and dark satire.
His novels—Little Brother, Say Goodbye to Jonny Hollywood, Lowlands, The Heart of a Child, and his latest mind-bending thriller The Dream Killer—have captivated readers with their atmospheric dread and sharp psychological insight.
Fearless, provocative, and impossible to ignore, Adam Cosco writes the kind of stories that leave a mark.
His novels—Little Brother, Say Goodbye to Jonny Hollywood, Lowlands, The Heart of a Child, and his latest mind-bending thriller The Dream Killer—have captivated readers with their atmospheric dread and sharp psychological insight.
Fearless, provocative, and impossible to ignore, Adam Cosco writes the kind of stories that leave a mark.
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Displaying 1 - 30 of 50 reviews
July 31, 2025
Just when I thought I was able to finally sleep without a nightlight, this novella had me rethinking that all over again.
Against my better judgement, i knew I shouldn't have read this one at night. But being a sucker for punishment, that did not stop me, no sir!
Adam Cosco has done it again, serving up for us another psychological horror so slippery and disturbing, it'll make you question whether your childhood imaginary friend was just pretend.
This time, we're tangled in the fractured mind of Leslie Adams: college student by day, suffering from blackouts at night.
She’s got cuts she didn’t make, bruises she doesn’t remember, and she has the unnerving feeling that someone, or something, is watching her. What a triple whammy!
There was so much to love about little brother.
First of all, there's the mystery, there's the possession, and
Cosco’s writing is definitely something i feel was written for the movies!
Have you ever watched the exorcist and saw Regan twitching and twisting in bed posessed? Well, Leslie gives Regan a run for her money.
I'm talking vivid, bone-chilling visuals, scenes that are so descriptive and detailed it slithers like a serpent into your subconscious, and with great relatable dialogue, you'd think Cosco really did write it for television.
Psychological horror fans, trauma horror fans, demon-in-the-dollhouse fans… y’all better line up because this book is for you!
Oh, and that ending? Chef’s kiss with a side of nightmare fuel. Another amazing novel Adam, you literally smashed it!
Against my better judgement, i knew I shouldn't have read this one at night. But being a sucker for punishment, that did not stop me, no sir!
Adam Cosco has done it again, serving up for us another psychological horror so slippery and disturbing, it'll make you question whether your childhood imaginary friend was just pretend.
This time, we're tangled in the fractured mind of Leslie Adams: college student by day, suffering from blackouts at night.
She’s got cuts she didn’t make, bruises she doesn’t remember, and she has the unnerving feeling that someone, or something, is watching her. What a triple whammy!
There was so much to love about little brother.
First of all, there's the mystery, there's the possession, and
Cosco’s writing is definitely something i feel was written for the movies!
Have you ever watched the exorcist and saw Regan twitching and twisting in bed posessed? Well, Leslie gives Regan a run for her money.
I'm talking vivid, bone-chilling visuals, scenes that are so descriptive and detailed it slithers like a serpent into your subconscious, and with great relatable dialogue, you'd think Cosco really did write it for television.
Psychological horror fans, trauma horror fans, demon-in-the-dollhouse fans… y’all better line up because this book is for you!
Oh, and that ending? Chef’s kiss with a side of nightmare fuel. Another amazing novel Adam, you literally smashed it!
December 17, 2024
Adam Cosco’s writing has the ability to pull you in immediately from beginning to end. Easily setting the tone and atmosphere in every novel he writes. Throughout the book, it kept me guessing who the “Little Brother” was and where and how he would come into play. Very well written and will have you coming back for more until you finish.
May 4, 2026
3.5 stars. This was ok for me. I enjoyed the author's style, but I just really struggled to connect with Leslie or any portion of the story. And, while I saw that many of the readers loved the ending, I didn't much care for it. It was fine, but nothing that blew my socks off. By the time I got there, the story just had become so tiresome and prolonged that I was completely zapped with reader fatigue. I just don't think this was meant for my particular preferences, but I can see why so many other horror readers would enjoy it. Definitely for a particular audience.
December 30, 2024
Adam Cosco delivers a horror novel that is suspenseful and gory at the end. I was able to read this novel by receiving a free copy and I am giving an honest review.
When Leslie is a young girl she commits a murder and survives a serious accident. As a result of her actions Leslie spends years in an institution. When she reaches 18 Leslie goes off to college and more murders happen. In the end we learn Leslie has a murderous parasite.
There were several things that happened in this novel that made me suspend my sense of the possible. But that is why we read such novels, right?
When Leslie is a young girl she commits a murder and survives a serious accident. As a result of her actions Leslie spends years in an institution. When she reaches 18 Leslie goes off to college and more murders happen. In the end we learn Leslie has a murderous parasite.
There were several things that happened in this novel that made me suspend my sense of the possible. But that is why we read such novels, right?
April 28, 2026
ARC review
Adams writing style is fluid and clear, making the story easy to follow. The plot felt original, and although the title hints at what to expect, it was still engaging to see how everything would unfold.
I particularly appreciated the short chapters and the well-executed time jumps, which added depth without ever making the narrative confusing.
As a fan of both horror and short stories, this was the perfect combination for me.
A big thanks to the author for giving me an ARC✨
Adams writing style is fluid and clear, making the story easy to follow. The plot felt original, and although the title hints at what to expect, it was still engaging to see how everything would unfold.
I particularly appreciated the short chapters and the well-executed time jumps, which added depth without ever making the narrative confusing.
As a fan of both horror and short stories, this was the perfect combination for me.
A big thanks to the author for giving me an ARC✨
November 3, 2025
Another insane book from Adam.
I absolutely loved the plot of Little Brother, getting to the end and realising what was actually going on FLOORED ME.
I absolutely loved the plot of Little Brother, getting to the end and realising what was actually going on FLOORED ME.
October 29, 2025
Twelve-year-old Leslie Adams feels something is wrong with her, inside, but her dad insists she’s just sleepwalking. But she isn’t sleepwalking when Leslie slashes Tommy Spence to death at his own birthday party, although she cannot remember the attack.
Six years later, Leslie tries to make a new beginning, enrolling at college to study investigative journalism, although Tommy’s murder haunts her. When she starts to experience disturbing incidents and blackouts, Leslie senses that whatever dark abomination she carries, which made her kill Tommy, is only growing stronger…
Cosco opens his highly creepy novella straight into one of Leslie’s unnerving “sleepwalking” episodes. It’s primeval, baffling, and believable. Cosco writes sharp, vivid sentences, his prose straightforward yet emotive as he unfolds this darkly atmospheric, preternatural tale.
Leslie’s fits are described with terrifying, visceral precision that both fascinates and repulses. The reader is aware that something within Leslie is causing her behavior, but Cosco keeps the details unpredictable and Leslie’s symptoms puzzling until the monstrous truth begins to emerge toward the end of chapter fifteen.
The novella is focused and pacey, the story told through Leslie’s close third-person perspective in short, rapid chapters that vibrate with increasing panic and revulsion.
She’s a well-drawn, singular character whose trajectory is believable in context. Her emotional disorientation and damage are revealed through her raw inner dialogue and fractured reactions, which become progressively more traumatized and frightened.
When Leslie begins college, the narrative takes on a distinctly ominous tone, heavy with foreboding. The reader is constantly on edge as Leslie’s issues grow more horrifying and volatile.
Nonetheless, Cosco offers glimpses of her personality away from the horror through occasional moments of normality and her relationship with Darren, a teaching assistant in the college's cadaver laboratory who also knew Leslie at school.
There is a connection between Leslie and Darren, but it’s slightly underdeveloped, which initially casts doubt on Darren’s motives and reliability. Notwithstanding, this ambiguity adds another layer of perplexity to the narrative.
Paulette, Leslie’s therapist, is depicted with subtlety; her immediate, reactive expressions often tell the reader more than her verbal responses. Cosco makes a bold decision with the therapist, which becomes the catalyst for discovering exactly what is inside Leslie.
The following few chapters serve up a smorgasbord of gore and grotesquerie. It could have veered into a far-fetched tangle, but Cosco maintains razor-sharp focus and momentum, enhanced by the bright, sterile medical setting and forensic detail that make the situation horrendously credible and grimly compelling.
Little Brother is a fast, compact, and bone-chilling biological horror with strong visual appeal. Highly recommended.
Six years later, Leslie tries to make a new beginning, enrolling at college to study investigative journalism, although Tommy’s murder haunts her. When she starts to experience disturbing incidents and blackouts, Leslie senses that whatever dark abomination she carries, which made her kill Tommy, is only growing stronger…
Cosco opens his highly creepy novella straight into one of Leslie’s unnerving “sleepwalking” episodes. It’s primeval, baffling, and believable. Cosco writes sharp, vivid sentences, his prose straightforward yet emotive as he unfolds this darkly atmospheric, preternatural tale.
Leslie’s fits are described with terrifying, visceral precision that both fascinates and repulses. The reader is aware that something within Leslie is causing her behavior, but Cosco keeps the details unpredictable and Leslie’s symptoms puzzling until the monstrous truth begins to emerge toward the end of chapter fifteen.
The novella is focused and pacey, the story told through Leslie’s close third-person perspective in short, rapid chapters that vibrate with increasing panic and revulsion.
She’s a well-drawn, singular character whose trajectory is believable in context. Her emotional disorientation and damage are revealed through her raw inner dialogue and fractured reactions, which become progressively more traumatized and frightened.
When Leslie begins college, the narrative takes on a distinctly ominous tone, heavy with foreboding. The reader is constantly on edge as Leslie’s issues grow more horrifying and volatile.
Nonetheless, Cosco offers glimpses of her personality away from the horror through occasional moments of normality and her relationship with Darren, a teaching assistant in the college's cadaver laboratory who also knew Leslie at school.
There is a connection between Leslie and Darren, but it’s slightly underdeveloped, which initially casts doubt on Darren’s motives and reliability. Notwithstanding, this ambiguity adds another layer of perplexity to the narrative.
Paulette, Leslie’s therapist, is depicted with subtlety; her immediate, reactive expressions often tell the reader more than her verbal responses. Cosco makes a bold decision with the therapist, which becomes the catalyst for discovering exactly what is inside Leslie.
The following few chapters serve up a smorgasbord of gore and grotesquerie. It could have veered into a far-fetched tangle, but Cosco maintains razor-sharp focus and momentum, enhanced by the bright, sterile medical setting and forensic detail that make the situation horrendously credible and grimly compelling.
Little Brother is a fast, compact, and bone-chilling biological horror with strong visual appeal. Highly recommended.
April 17, 2026
I received a copy of Little Brother from the author in exchange for an honest review.
This is the second book I’ve read from Adam Cosco, and once again, he delivers exactly what I’ve come to expect, tight, unsettling horror that wastes no time getting under your skin. Clocking in as a novella, this is an easy one-sitting read, but don’t mistake its length for lack of impact.
The story follows Leslie, a young woman with a deeply disturbing past. As a child, she committed a brutal murder...one she has no memory of. After spending years in a mental facility, she’s finally given a chance at something resembling a normal life when she’s allowed to attend college. But normal doesn’t last long. Not long after her arrival, people around her begin to die, and the question quickly becomes whether Leslie’s past is truly behind her… or if something far darker is still lurking beneath the surface.
Cosco does a great job building tension in such a short space. There’s a constant sense of unease surrounding Leslie, and the ambiguity of her character is what really drives the story. You’re never quite sure whether to sympathize with her or fear her, and that uncertainty keeps the pages turning.
If I had one critique, it would be that I wanted just a bit more depth, particularly when it came to the side characters and the broader mystery. The story moves fast, which works in its favor, but it also leaves you wishing for a little more time to fully explore its ideas.
Overall, Little Brother is a quick, eerie read that sticks with you after you finish. If you’re a fan of psychological horror with a sharp edge, this is definitely worth checking out.
This is the second book I’ve read from Adam Cosco, and once again, he delivers exactly what I’ve come to expect, tight, unsettling horror that wastes no time getting under your skin. Clocking in as a novella, this is an easy one-sitting read, but don’t mistake its length for lack of impact.
The story follows Leslie, a young woman with a deeply disturbing past. As a child, she committed a brutal murder...one she has no memory of. After spending years in a mental facility, she’s finally given a chance at something resembling a normal life when she’s allowed to attend college. But normal doesn’t last long. Not long after her arrival, people around her begin to die, and the question quickly becomes whether Leslie’s past is truly behind her… or if something far darker is still lurking beneath the surface.
Cosco does a great job building tension in such a short space. There’s a constant sense of unease surrounding Leslie, and the ambiguity of her character is what really drives the story. You’re never quite sure whether to sympathize with her or fear her, and that uncertainty keeps the pages turning.
If I had one critique, it would be that I wanted just a bit more depth, particularly when it came to the side characters and the broader mystery. The story moves fast, which works in its favor, but it also leaves you wishing for a little more time to fully explore its ideas.
Overall, Little Brother is a quick, eerie read that sticks with you after you finish. If you’re a fan of psychological horror with a sharp edge, this is definitely worth checking out.
December 24, 2024
Having already read a couple of Adam Cosco's books, I didn't hesitate to go into this one totally blind. To be frank, I believed, somewhat vaguely, that it'd be about a demonically possessed kid (the titular "Little Brother"). I was quite surprised to find a story about a mentally troubled teenage girl, whose life kept going from bad to worse due to her mysterious blackouts, during which she acts violently and irrationally. Cause pretty much unknown. The author kept dropping hints about demonic possession, but the lack of any "little brother" in the story had me wondering if I'd gotten the wrong book lol. Things were getting more and more terrifying for the girl, who grew to be a much tormented and traumatized woman, yet found the strength to go to college, and even found herself romantically involved. And then at last, I got my answer about the little brother. Hell. I never imagined this development and I was very much impressed with the author's inventiveness. This is an author to watch! I eagerly recommend the book both for its respectful and balanced treatment of people facing mental troubles and its portrayal of a totally unexpected and horrifying plot twist!
April 25, 2026
✨Leslie Adams has been plagued by tragedy and odd behavior her entire life. After the brutal death of a classmate at a party when she was younger, Leslie has been in therapy and is ready to just be a normal college age young woman. But after reconnecting with an old classmate, Darren, who was there the night of the tragedy, Leslie’s behavior becomes even more odd and dangerous. Can she and Darren figure out what’s causing all of this chaos?✨
Okay, so I clocked this one about halfway through the book, but it’s only because I have seen a very specific 1980s horror movie (that I won’t name here to avoid giving it away for anyone else). 😉
I always love a good, fast paced gory story. Even better when it grabs you right from the first page. I also appreciate it when men write women who are actively involved in saving their own asses. Leslie may be in distress, but she’s no fainting damsel or wilting flower.
Okay, so I clocked this one about halfway through the book, but it’s only because I have seen a very specific 1980s horror movie (that I won’t name here to avoid giving it away for anyone else). 😉
I always love a good, fast paced gory story. Even better when it grabs you right from the first page. I also appreciate it when men write women who are actively involved in saving their own asses. Leslie may be in distress, but she’s no fainting damsel or wilting flower.
March 28, 2026
I got this book free as long as I left a review, so I went in blind. Only took me a day to read (off and on throughout the day).
Overall, good story line. I felt like it jumped quite a bit and I was trying to figure out what day/time it was while reading.
As far as visualization, it was decently written. It didn't go into great detail on surroundings which I found ok for this book (short story?).
I would definitely read this author again.
Spoiler
I'm not understanding the part about when she kills Paulette. In one paragraph it states that Crayola is trembling and cowering in the corner of the room and literally a paragraph later, it states that Crayola's neck is broken and head going the wrong way...
Overall, good story line. I felt like it jumped quite a bit and I was trying to figure out what day/time it was while reading.
As far as visualization, it was decently written. It didn't go into great detail on surroundings which I found ok for this book (short story?).
I would definitely read this author again.
Spoiler
I'm not understanding the part about when she kills Paulette. In one paragraph it states that Crayola is trembling and cowering in the corner of the room and literally a paragraph later, it states that Crayola's neck is broken and head going the wrong way...
This entire review has been hidden because of spoilers.
May 4, 2026
What starts as a chilling mystery surrounding a forgotten childhood tragedy slowly spirals into something deeply unsettling, emotional, and genuinely terrifying. Leslie Adams is such a compelling character. She is broken, unreliable, and vulnerable.
The atmosphere in this book was creepy. Every blackout, every bruise, every eerie vision had me questioning what was real right alongside Leslie. There is demon and possession horror rooted in trauma, memory, guilt, and the fear of not even being able to trust your own mind.
And the visuals? Some scenes felt so cinematic I could picture them playing out frame by frame like a horror movie.
Thank you Adam Cosco & Book Sirens for the #gifted ecopy.
All opinions are my own 🖤
The atmosphere in this book was creepy. Every blackout, every bruise, every eerie vision had me questioning what was real right alongside Leslie. There is demon and possession horror rooted in trauma, memory, guilt, and the fear of not even being able to trust your own mind.
And the visuals? Some scenes felt so cinematic I could picture them playing out frame by frame like a horror movie.
Thank you Adam Cosco & Book Sirens for the #gifted ecopy.
All opinions are my own 🖤
May 20, 2026
Please don't tell me i'm the only person that didn't focus on the title of the book. I was invested in determining how this was going to end. I felt there was a lot of filling but no cake. There were parts in the story that had me like, huuuuuuhhhh??? What????
I have my moments, today was one of those days. I looked at the title, kept reading, and then it clicked for me. I think this could have had an ending that sounded more realistic?, I guess? Don't ever accuse me of being an author, but I thought it went from believable to gimme a gosh darn glass of carrot juice. The ending made me ASSume the author wanted an ending that wasn't expected.
I have my moments, today was one of those days. I looked at the title, kept reading, and then it clicked for me. I think this could have had an ending that sounded more realistic?, I guess? Don't ever accuse me of being an author, but I thought it went from believable to gimme a gosh darn glass of carrot juice. The ending made me ASSume the author wanted an ending that wasn't expected.
October 16, 2025
Grotesque, disturbing & thrilling. Adam Cosco is an incredible writer. Little Brother is a brilliant novel following Leslie Adam’s as she battles with unknown forces living within her. This book is not a lighthearted read, it showcases a character surviving through the darkest moments of her life. Through blackouts and tragedies, Adam Cosco guides us into Leslie’s life and the cause of her worst moments.
I truly adore Cosco’s writing style. It’s not just storytelling, it’s immersive and intense. I felt drawn into to darkness with the characters. I shivered and white knuckled my tablet. This isn’t just reading, it’s feeling, experiencing.
Truly incredible.
I truly adore Cosco’s writing style. It’s not just storytelling, it’s immersive and intense. I felt drawn into to darkness with the characters. I shivered and white knuckled my tablet. This isn’t just reading, it’s feeling, experiencing.
Truly incredible.
April 3, 2026
Let me start by saying I loved The End by Adam Cosco! I gave that one five stars. This one was still entertaining I just didn't love it as much. It is written in a more choppy vingettes and felt like you were watching a movie on fast forward and skipping chapters. Due to the type of reader I am (primarily character driven with plot being secondary to me) this was not ideal. There was no time to get to know anyone as this was mostly plot driven. It also felt very silly and a bit campy to me (not a bad thing necessarily) and you need to turn the brain off to enjoy it in my opinion. I am not sure this is what this was meant to be but if you enjoy a campy, gross body horror type book this could be for you. I could imagine it as a b horror movie that you can laugh while you also have to cover up your eyes to keep from feeling a bit ill!
If you know which if any other Adam Cosco books could be for the type of reader I am I’d be happy to give them a try.
If you know which if any other Adam Cosco books could be for the type of reader I am I’d be happy to give them a try.
April 26, 2026
I received this copy in exchange for an honest review.
This is a bite-sized body/possession horror book, well-paced and with well-researched medical details that amp up the body horror. Surgery is perhaps the most terrifying thing of all (to me, at least).
I would have liked more development of Leslie and Darren, both as individual characters and as school acquaintances turned lovers.
This is a bite-sized body/possession horror book, well-paced and with well-researched medical details that amp up the body horror. Surgery is perhaps the most terrifying thing of all (to me, at least).
I would have liked more development of Leslie and Darren, both as individual characters and as school acquaintances turned lovers.
April 27, 2026
3.25 This is a fun read and a campy horror story that feels like it would be great told while sitting around a campfire—very dark and gory. I really like the way Cosco writes and describes things, and how he gets you in the character’s corner early on. This particular story definitely calls for suspension of disbelief. I’d like to make some comparisons, but I went in blind, and I think you should too. Thanks to the author and Book Sirens for the ebook!
May 15, 2026
Well this was a fun, gore filled, brutal read. I did kind of guess what the twist was gonna be but I still enjoyed the build up to it.
Leslie commits murder at the ripe age of 12 but she has no memory of doing it. Something seems to have taken control of her body. After spending many years in an institution, she finally leaves to pursue journalism. But the murders start soon after. Pick it up to see what unfolds!
Leslie commits murder at the ripe age of 12 but she has no memory of doing it. Something seems to have taken control of her body. After spending many years in an institution, she finally leaves to pursue journalism. But the murders start soon after. Pick it up to see what unfolds!
December 12, 2024
As I went into this book blind, I had no idea what the story was about. The story pulled me in quite quickly. I really felt for the main character and her situation. The writing style is easy to absorb and the pace keeps you interested. The subject matter was not at all what I was expecting. There was a couple of inconsistancies but they were only minor to the story. If you are looking for something different this would be a good choice.
August 5, 2025
Little Brother by Adam Cosco
🌟🌟🌟🌟🌟
Exciting dark psychological horror story filled with emotion and creep!!
This story grabbed me and sucked me in! There is lots of suspense, twists and gore!
The story focuses on Leslie and some of the trauma she has gone through growing up. Will past memories be revealed?
Adam Cosco can tell a great story!!
*Check out this fast read!*
🌟🌟🌟🌟🌟
Exciting dark psychological horror story filled with emotion and creep!!
This story grabbed me and sucked me in! There is lots of suspense, twists and gore!
The story focuses on Leslie and some of the trauma she has gone through growing up. Will past memories be revealed?
Adam Cosco can tell a great story!!
*Check out this fast read!*
December 3, 2024
This is a story that will stick with you! The constant unsettling atmosphere, well-developed characters, and a truly surprising plot twist make for a 5 star read for any horror reader!
December 14, 2024
Story started off slow and was a little confusing as to what was causing the episodes Leslie was having. Once it was explained, I enjoyed the story a lot and couldn't wait to continue to read.
January 5, 2025
The book was slow to start, but once it got going I was definitely along for the ride!
It's a really good, dark story with a big twist near the end that you won't see coming.
It's a really good, dark story with a big twist near the end that you won't see coming.
December 16, 2024
This was such an atmospheric creepy read! I was hooked from the start, and the visuals created in my mind from the writing SCREAMED Black Mirror! This was the first book I’ve read by this author, but won’t be the last!
December 9, 2024
I loved reading this. However not for those who are faint of heart or don't like gore. I enjoyed reading about Leslie and her condition, how Little Brother comes in to play.
July 29, 2025
Ummm..buckle up for the best read of your life. I’m serious! This book has everything love, hate, mystery, darkness, evil, murder, blame and forgiveness.
Provides each characters point of view, not just the main characters.
When Leslie (Les) Adams was twelve, there was a brutal life changing moment in that happened in her life. With her mother Angela and father Mark, placing her in an institution for her own safety.
There her therapist Paulette and little dog Crayola help her. Thinking she’s better Paulette arranges for her to go to college.
Now she has the chance to see where her second chance takes her. She wants to be a journalist. Of all
the people to see there, Darren (Danny) King. from years back is there as a student TA in anatomy.
Back then, before Les passed out from throwing herself off she roof, Danny had look into her eyes. Thinking she’s dead only to see in her eyes a calmness when she opens them and sees with fear. But in that moment a strong silent connection flows between the two, binds them, deeper than words.
But death continues to follow her. Her “dark passenger” that seems to take over her actions.
When her beloved therapist and Crayola shows up to help, the unspeakable happens.
Now, finally others sees what she has lived with. And it sends fear and Chills thru Officer Mason, in charge of the case. And all the Dr’s., Dr. Shahram, Dr. Peyton, Dr. Donald Dr. Hauptman’s, and Dr. Eugene Porter.
And her sweet dear friend who’s never forgotten her Dr. Danny King.
This amazing author has written a special thriller that not only scares and thrills but makes us feel an emotionally empathy on the characters themselves. We’re allowed to feel Les’s despair, hate for herself, despair and desire to be remotely hum.
Darren wants to save her, she fears he cant. How can a broken person go on in life…broken?
She’s convinced she belongs to the darkness
Somethings inside her, wanting to claw out.
An amazing book! Do yourself a favor and read this!⭐️⭐️⭐️⭐️⭐️.
I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Provides each characters point of view, not just the main characters.
When Leslie (Les) Adams was twelve, there was a brutal life changing moment in that happened in her life. With her mother Angela and father Mark, placing her in an institution for her own safety.
There her therapist Paulette and little dog Crayola help her. Thinking she’s better Paulette arranges for her to go to college.
Now she has the chance to see where her second chance takes her. She wants to be a journalist. Of all
the people to see there, Darren (Danny) King. from years back is there as a student TA in anatomy.
Back then, before Les passed out from throwing herself off she roof, Danny had look into her eyes. Thinking she’s dead only to see in her eyes a calmness when she opens them and sees with fear. But in that moment a strong silent connection flows between the two, binds them, deeper than words.
But death continues to follow her. Her “dark passenger” that seems to take over her actions.
When her beloved therapist and Crayola shows up to help, the unspeakable happens.
Now, finally others sees what she has lived with. And it sends fear and Chills thru Officer Mason, in charge of the case. And all the Dr’s., Dr. Shahram, Dr. Peyton, Dr. Donald Dr. Hauptman’s, and Dr. Eugene Porter.
And her sweet dear friend who’s never forgotten her Dr. Danny King.
This amazing author has written a special thriller that not only scares and thrills but makes us feel an emotionally empathy on the characters themselves. We’re allowed to feel Les’s despair, hate for herself, despair and desire to be remotely hum.
Darren wants to save her, she fears he cant. How can a broken person go on in life…broken?
She’s convinced she belongs to the darkness
Somethings inside her, wanting to claw out.
An amazing book! Do yourself a favor and read this!⭐️⭐️⭐️⭐️⭐️.
I received a free copy of this book via Booksprout and am voluntarily leaving a review.
September 1, 2025
'Leslie suffers from blackout spells and wakes up with unexplained scars. Despite being diagnosed as depressed, she has no memory of self-harming. As her mental state worsens, she starts to believe something evil is lurking inside her...'
I received this ARC copy a few days back and immediately the book cover attracted me. I quickly went through the introduction and I was so sure about reading this novel.
Now, the characters of this novel were fantastically chosen and explained. Among all of the characters, my favourite was Darren. He was such a sweetheart. Inspite of watching all the horrible things Leslie did in front of him, he stayed with her till the end.
The ending was a fantastic one and seriously needs appreciation. From the very beginning, I kept thinking Leslie was possessed but the story was completely different. I absolutely loved the plots, the twists and the ending too.
A 4.5 star read after a long time.
My first read from this author and I absolutely loved the experience throughout.
I received this ARC copy a few days back and immediately the book cover attracted me. I quickly went through the introduction and I was so sure about reading this novel.
Now, the characters of this novel were fantastically chosen and explained. Among all of the characters, my favourite was Darren. He was such a sweetheart. Inspite of watching all the horrible things Leslie did in front of him, he stayed with her till the end.
The ending was a fantastic one and seriously needs appreciation. From the very beginning, I kept thinking Leslie was possessed but the story was completely different. I absolutely loved the plots, the twists and the ending too.
A 4.5 star read after a long time.
My first read from this author and I absolutely loved the experience throughout.
March 10, 2025
Little Brother is one of those books that crawls under your skin and lingers in your mind, long after you’ve turned the last page. I’ve always been drawn to stories that blur the lines between psychological tension and horror, and Adam Cosco nails this mix perfectly.
Leslie’s journey is both heartbreaking and terrifying. As someone who has felt the weight of mental health struggles, her descent into confusion and fear hit close to home. The way Cosco portrays her inability to trust her own mind—her blackouts, the inexplicable scars, and the way the world insists it’s just depression—felt like a visceral, unsettling reflection of how mental illness can warp reality. I found myself questioning, along with Leslie, whether the truth really was as simple as it seemed.
And then there's the dark, eerie atmosphere that Cosco weaves throughout the story. Every page felt like a slow unraveling, a terrifying sense that something other was happening behind the scenes, that the horror wasn’t just in Leslie’s mind but something much more sinister lurking beneath.
The twists are sharp, clever, and downright chilling. This is a book that doesn’t just challenge your expectations—it pulls you into a space where you’re not sure who you can trust. The final revelations hit like a punch to the gut, leaving me breathless and haunted by the complexity of family loyalty, memory, and the monsters we carry.
A psychological thrillers that delve deep into the human psyche, Little Brother will keep you up at night, turning the pages with both fear and fascination. Cosco has delivered a dark, unforgettable story that asks the question: What if the evil we fear is the one that’s been there all along?.
Leslie’s journey is both heartbreaking and terrifying. As someone who has felt the weight of mental health struggles, her descent into confusion and fear hit close to home. The way Cosco portrays her inability to trust her own mind—her blackouts, the inexplicable scars, and the way the world insists it’s just depression—felt like a visceral, unsettling reflection of how mental illness can warp reality. I found myself questioning, along with Leslie, whether the truth really was as simple as it seemed.
And then there's the dark, eerie atmosphere that Cosco weaves throughout the story. Every page felt like a slow unraveling, a terrifying sense that something other was happening behind the scenes, that the horror wasn’t just in Leslie’s mind but something much more sinister lurking beneath.
The twists are sharp, clever, and downright chilling. This is a book that doesn’t just challenge your expectations—it pulls you into a space where you’re not sure who you can trust. The final revelations hit like a punch to the gut, leaving me breathless and haunted by the complexity of family loyalty, memory, and the monsters we carry.
A psychological thrillers that delve deep into the human psyche, Little Brother will keep you up at night, turning the pages with both fear and fascination. Cosco has delivered a dark, unforgettable story that asks the question: What if the evil we fear is the one that’s been there all along?.
December 17, 2024
For me, this is the best book Adam Cosco has released yet. I love his writing style, and his character development. In this story, we meet young child Leslie who, at a birthday party, becomes forever scarred by an event that caused the death of another playmate. Throughout the course of the story, we see Leslie growing up, still traumatized, and being institutionalized and treated by a therapist. As the years comntinue to pass, and now Leslie is in college, her mental health issues once again begin to come to the forefront, and death and violence follow. All of this occurs during her first 2 decades of her life.
Then the fun begins.
And we meet The Little Brother.
Cosco starts the story at a slower pace, in order to set the mood for what comes later. And what comes later is a suspense-filled, at times gory, climax that will satisfy all readers of horror.
Well done, Adam Cosco! This is a 5 Star read for sure! Looking forward to more from this author!
Then the fun begins.
And we meet The Little Brother.
Cosco starts the story at a slower pace, in order to set the mood for what comes later. And what comes later is a suspense-filled, at times gory, climax that will satisfy all readers of horror.
Well done, Adam Cosco! This is a 5 Star read for sure! Looking forward to more from this author!
March 8, 2026
I have always been intrigued by unusual medical premises in fiction, and Little Brother certainly delivers a striking one. The idea of a rare biological condition shaping the entire narrative gives the story an immediate sense of curiosity and unease. The medical discussions surrounding Leslie’s condition were particularly interesting and added a layer that made the premise feel more grounded.
At the same time, the portrayal of the condition itself occasionally stretches plausibility. During some of the more elaborate medical scenes, Leslie’s behaviour borders on the supernatural. I also felt that the ending was a tad bit rushed.
Overall, it is an imaginative and memorable concept that makes for a quick and engaging read, even if certain elements did not fully land for me. This was about a 3.5-star read for me.
At the same time, the portrayal of the condition itself occasionally stretches plausibility. During some of the more elaborate medical scenes, Leslie’s behaviour borders on the supernatural. I also felt that the ending was a tad bit rushed.
Overall, it is an imaginative and memorable concept that makes for a quick and engaging read, even if certain elements did not fully land for me. This was about a 3.5-star read for me.
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