This book is absolutely captivating. From the moment I started reading the first page, I was completely hooked. The plot is incredibly well-thought-out: magically horrifying. I was constantly on edge, never knowing what to expect next. Riccardo's character is fantastic, it's nice reading about a protagonist with a simple yet challenging life and to add in Lorenzo as a love interest was beautiful. Perihan’s manuscripts was everything, I love how detailed they are. She was truly a WOMAN. but at the same time I hated how she treated her husband-like he was gum on the bottom of her shoe. When the plot took a darker turn, I was completely blown away—truly impressive. This is by far one of the coolest books i’ve ever read. The only minor thing that bothered me was how quickly Riccardo agreed to move into Perihan’s old house. I prefer main characters to be a bit more stubborn, but that's just my personal taste. I have no doubt many people will absolutely devour this book. I’m eagerly waiting for its release. I need a paperback copy right now! 🤩

**3/5 Stars**

This novel offers an eerie, atmospheric tale about how far people are willing to go to preserve their dreams. Riccardo, a struggling writer, inherits his grandmother Perihan’s dilapidated villa in Milan, along with her unsettling butterfly collection. As he navigates the strange house, unearths her diary, and tries to understand her mysterious death, the story teeters between an engaging mystery and a somewhat confusing narrative. The slow-burn tension and peculiar cast of characters create an intriguing setup, but the plot sometimes drags, leaving more questions than answers.

What sets this book apart is its fresh take, blending elements of fantasy and horror in a way that feels unique. However, while the dark, Gothic elements of the estate are vividly described, the pacing and resolution didn’t fully deliver on the suspense built throughout. Some parts of the story felt disjointed, and I found myself wishing for deeper character development, particularly for Riccardo.

Overall, this book offers a unique premise with an interesting mix of genres, but it didn’t quite reach its full potential for me.

Thanks Netgalley and Harlequin for the arc.
3.5 stars.

Now this suspenseful horror started off strong for me with the creepy vibes but quickly fell flat. The main plot was the MC reading his deceased grandma's journal and times it was disjointed and confusing. As he was reading her writing it would go inside her memories and then in the journal she would talk about other memories within memories. Felt very memoryception to me. I got lost a few times in many of the references. I was just not following the time periods in the memories at all so the middle of the book really dipped for me. And the POV would be other characters and flash to their memories and then over to more characters. It just was abrupt in some places and sometimes I couldn't tell who was relaying what and the characters fell flat.

Now some good things. I enjoying the history and the culture and some of the explanations were okay to follow. The story idea was Intruiging and I'll never look at butterflies the same way again.

It had the right kind of creep/suspense factor I do enjoy and horror at the end but it took too long to get there.

Thanks again Netgalley and Harlequin for the earc!

A fun horror read with symbolism. Great read leading into spooky season.

Supernatural
Magical Realism
A touch of romance

I read half of this book and the characters and the setting never caught for me. I'm not sure why and likely it's just not the book for me.
I don't post negative reviews on my blog or elsewhere.

From the outset, Turhan establishes a haunting ambiance that envelops Riccardo and the crumbling estate he has inherited. The villa, reminiscent of faded grandeur, is not merely a backdrop but a character in its own right. Its neglected halls and the ominous butterfly collection serve as a metaphor for the complexities of memory and inheritance. Instead of a warm familial embrace, Riccardo finds himself steeped in shadows—his grandmother’s old friends, who linger with an air of secrecy, add layers of unease to his exploration of this once-loved home.
Riccardo’s journey is both physical and psychological. As he digs deeper into Perihan's belongings, the story unfurls as a rich tapestry of past and present, revealing heartbreaking truths and haunting figures from the past. The diary—an heirloom of sorts—holds the promise of revelation and serves as a thread that intertwines Riccardo's fate with that of his grandmother.
Tension escalates as threads of the narrative weave through Riccardo’s search for inspiration and the unnerving atmosphere of the estate. The butterflies, once symbols of beauty, take on a more sinister connotation, reflecting the duality of nature and art, creation and destruction. This duality echoes in the psyche of the protagonist, rich with anxiety and despair, as he battles not merely writer’s block but personal demons.
The pacing in "Their Monstrous Hearts" is both deliberate and suspenseful, allowing readers to linger in moments of dread and curiosity. Turhan expertly builds tension, encouraging page-turning with each new revelation. Themes of legacy, grief, and the creative struggle are explored with insight and depth, making the novel resonate on multiple levels.
What truly stands out in this novel is Turhan's ability to balance rich storytelling with existential inquiries about life, art, and the often-entangled relationships that bind us. By the time Riccardo's perilous journey reaches its climax, you will be left not just with answers but with profound questions about the nature of creation, belonging, and memory. Overall, its an enthralling read for fans of literary fiction entwined with gothic elements.

Their Monstrous Hearts by Yiğit Turhan is a haunting blend of gothic horror, magical realism, and family mystery. The story centers on Riccardo, a struggling writer who inherits his grandmother’s dilapidated villa in Milan, along with her enigmatic butterfly collection. As Riccardo uncovers his grandmother Perihan’s secrets through her unfinished manuscript, he finds himself entangled in a dark, supernatural legacy.

Turhan expertly weaves themes of grief, legacy, and the supernatural, creating an unsettling atmosphere reminiscent of classic gothic literature. The suspense builds as Riccardo’s investigation reveals eerie connections between past and present, with each revelation drawing him deeper into danger. The narrative’s slower middle is balanced by a gripping conclusion that leaves readers questioning reality and the nature of obsession.

With vivid prose and a fascinating exploration of butterflies as symbols of transformation, the novel stands out for its well-researched details. Perihan, though deceased, becomes a compelling character, driving much of the story’s tension and emotional depth. Fans of atmospheric horror, mystery, and introspective narratives will find Their Monstrous Hearts to be a chilling and thought-provoking read.

Turhan’s debut is a remarkable fusion of literary artistry and gothic suspense, with a supernatural edge that sets it apart in the genre. The slow-burn tension, coupled with its exploration of identity and immortality, makes this a must-read for horror enthusiasts and readers looking for something both eerie and intellectually stimulating.

The writing is captivating. This book begins like a memoir of the MCs grandmother (Perihan), with some historical fiction vibes. It was slow in the beginning, but then it turned into a very strange story. The MC describes it well, “Written from her perspective, it starts as sort of a memoir but quickly transforms into a wild fantasy.” The transition between thoughts/ideas/scenarios in Perihan’s manuscript felt abrupt; it was kind of chaotic at times and hard to follow. It seems the focus of the book is about Perihan’s obsession over beauty and immortality. It’s easy to blur the lines between reality and fantasy when you’ve become overcome with a passion to chase immortality. For me, the ending *can* be interpreted two different ways. Are we left with Riccardo or Perihan? Such a strange, yet entertaining book! 3.5⭐️

Their Monstrous Hearts stuck out to me due to the interesting synopsis, the beautiful cover, and the label as a horror story. As a huge fan of horror and all things spooky, I was very curious to read a story that combined some of my favorite things: horror stories, writing, and butterflies. The world building and buildup was well done and important information was told as a “story within a story” which I found to be very fun! However, the ending seemed to have a rushed feeling and everything seemed to happen quickly with very little detail and description. This seemed a bit jarring due to the care taken earlier to build up the world and the lore. There was also very little horror for a horror story. I wish there had been more to the book and especially to the ending.

Overall this was a solid 3/5, a decent little tale of the macabre, perfect for the start of spooky season. It was a decent story, but I just so desperately wanted more from it! Def worth the read!

Thank you to NetGalley, the publishing team, and the author for allowing me to dip into this enjoyable read!🖤

Thank you NetGalley and publisher for this arc!

This was such a good book. I really enjoyed it. More than I thought I would. I loved the writing style. This book had me hooked from page one. This is a first for me by this author but will not be my last!!

This is a story of family, of loss, of Riccardo, a young struggling writer, who is on the brink of being evicted, so when a stranger arrives at his door with the news that his grandmother has passed away, leaving him to inherit her villa in Milan, including her collection of butterflies, he leaves with little hesitation. This is just what he needs.

When he arrives in Milan, he is somewhat surprised by the changes in her villa, although many years have passed since he was there, he remembers how lavish it was when he was much younger. Even the butterflies held in their glass cases seem to have lost their beauty, and her villa seems to have deteriorated over time.

While there are moments of despair, and moments of danger, as well, this is listed in the horror category, so I appreciated the lack of what most consider horror since I’m not a fan of that genre. There are some lovely moments, as well. To me, it felt like magical realism with a sprinkling of some moments of danger.


Pub Date: 08 Apr 2025

Many thanks for the ARC provided by Harlequin Trade Publishing / MIRA/HTP Books

This book was read as an e-ARC received via NetGalley. All opinions are my own.

Rated 3.5 stars

Their Monstrous Hearts is a gothic mystery with horror elements. Riccardo is a struggling author living in Paris, who comes back to his grandmother's estate in Italy to attend her funeral. He notices strange things about the way his grandmother's friends are behaving, and notices changes in the estate. He finds a book with his name on it, and proceeds to read a detailed memoir of his grandmother's life. As the story progresses, we learn more about the mysterious butterflies and their significance to his grandmother (Perihan) and to the overall story. The gothic, horror-style elements build slowly, but definitely ramp up more towards the end of the book.

The story is interesting, and if you like a slowly-revealed mystery/secret, this could be a great book to read! Perihan starts her memoir by reminiscing on her childhood in Turkey, and her character arc as we learn more about what her childhood was like, and what matters to her.

Thank you to Netgalley, the author, and the publisher for the opportunity to read this enticing story!

Their Monstrous Hearts by Yigit Turhan was a wild ride from start to finish.

We meet Perihan and are quickly met with a scene that can only be described as ominous. From there, we meet Ricardo, the grandson of Ricardo, who is an author struggling with writers block, but also struggling with his current living situation.

An old friend of his grandmother's comes to find him and convinces him to leave Paris and to return to Milan as a family tragedy happened and his presence is required.

This story had an aura of mystery and eery secrets! I enjoyed reading Perhian's manuscript and thoroughly enjoyed the way the author created a beautiful and terrifying blend of two lives being told together. One from the perspective of Ricardo, and the other from Perihan.

This book was NOT at all what I expected, but it was better. It was a definite 5 star read. The last 30 percent of the book left my grappling for answers.

Pick this book up when it becomes available if you enjoy horror, mystery, family secrets, and horrible creatures!

Was different than I expected but was definitely a good time I can’t wait to purchase an actual copy for my shelf

Have you ever read a book that was filled with mysteries & horror? Well, this book is filled with dark mystery that will have you on edge. Just imagine having the power to turn humans into monsters with butterflies helping the transformation. This is definitely a good book.

This book was good at keeping my interest but some of the plot was difficult to understand how it flowed, i found myself having to go back and reread a lot. I also didn’t understand why it was considered horror until the action happened in the last 30 pages. The build up took a while but i did appreciate the storytelling in the manuscript, I liked how it was presented as a dual timeline basically. Thank you to NetGalley and Harlequin Trade Publishing for this eARC

I liked this book more than I thought I would! While I normally don’t pick up horror-type books, I really enjoyed this one! I think it’d suit anyone who really loves creepy books with clues scattered throughout the chapters! I’d love to reread this after it’s published during the fall months (probably around Halloween lol).

Many thanks to NetGalley for the arc!

I mean, Their Monstrous Hearts by Yigit Turhan wasn’t bad, but it was definitely one of those books that felt like it was trying really hard to be deep and eerie, and it just… wasn’t hitting for me. The vibes were all there—gothic villa, creepy butterflies, mysterious old ladies—but somehow it all fell flat. Riccardo’s whole “struggling writer finds himself in a haunted estate” thing felt more tired than tense, and honestly, the butterflies were more interesting than half the characters. I didn’t hate it, but it didn’t give me the chills I was hoping for. Maybe it’s your vibe if you’re into moody atmospheres that don’t quite deliver.

Thank NetGalley, Harlequin Trade Publishing, and the author for an ARC of this book!

Their Monstrous Hearts follows Riccardo, a failing author, who has just been informed of his grandmothers passing. Being the sole heir to her estate, and having no other options, he finds himself traveling to her funeral. Riccardo feels something is not quite what it seems and on his self guided tour of the house he finds his grandmothers diary. Hoping this may help him find out how her mysterious death came to be, as well as give him inspiration for his own manuscript, Riccardo begins to read only to find a more mysterious side of his grandma than intended. The further he makes it into her diary the more his life is at risk. Will he find what happens to Perihan, and if so will he make it out alive?

Overall I enjoyed Their Monstrous Hearts. I lked this horror genre, but found the middle was a little hard to read which is why it took me so long to finish this book. I enjoyed the beginning, and the ending but something about the middle was lack luster and nearly had me not wanting to finish the book. However I really wanted to know where the butterflies came from and the significance and hold they had on Perihan.

3.5 stars rounded up to 4 stars.

This was a propulsive gothic horror that I think would translate SO well on the big screen! THE BUTTERFLIES!! The horror! The fashion! The locales! I could see A24 picking this novel up for adaptation.

My favorite part of this was Perihan’s manuscript! It was WILD. Fantastical. Unbelievable. Fascinating. Creepy. Also, if you are a fan of a book within a book, this will hit the spot.

I read this in 2 days and I don’t do that often. My pace is usually 1 book in 7 days

One of the only critiques I have is that the writing style wasn’t my favorite. It was a bit repetitive, using the same descriptive words repeatedly (‘uneasy’ being one of them). But I NEEDED to know what was going on so I plowed through this. If you are a fan of horror films like Get Out, Hereditary, or anything by David Lynch, I think you’d enjoy this!