Goodbye Butterfly: A Dark Military Romance

by Calia Quinn

You don’t survive loving a man like Dax Kingston.
Brutal. Possessive. Obsessed to the point of ruin.
He calls Cassandra his Butterfly—fragile wings pinned beneath his hands—and no matter how far she runs, he always finds her.

He’s a soldier forged in war, scarred inside and out.
She’s the only thing he can’t let go.
And in the shadows of the Seventh Sin, where secrets bleed into smoke and glass, he makes her one
he’ll ruin her right… or not at all.

This isn’t a love story.
This is obsession.
This is every red flag you’ve ever craved wrapped in one dangerous man who would rather destroy her than ever let her go.

Inside you’ll

Dark military romance

Obsessive, possessive anti-hero

Stalker / protector obsession

Enemies-to-lovers heat

Hurt/comfort + trauma bonds

Toxic love, all-consuming passion

War-scarred, broken soldier who only breathes for her

⚠️ This book contains graphic themes and intense content. Please visit the author’s website for a full list of content warnings before reading.

554 pages, Kindle Edition

Published December 9, 2025

Reviews

[Emmy Wong · Rating 5 out of 5]

I am completely lost for words, this book had me going through the entire emotional spectrum. I was bawling my eyes out from start to finish and I could not take my eyes off the page!

I haven’t read a military romance with such a good depiction of PTSD and what it truly does to a person, and that part of what made this book so special and so heartbreaking.

It’s also their entire relationship is built on broken trust but this odd addiction to each other because they make each other feel better.

This book made me an emotional wreck and I’d don’t think I’ll ever recover from this. There are so many amazing plot twists and that cliffhanger was just brutally insane. I can’t wait for the next book!.

I received a free copy of this book and am voluntarily leaving a review.

[Read With Momma Shark · Rating 4 out of 5]

Goodbye Butterfly is not a soft love story. It’s heavy, obsessive, and emotionally draining in a way that feels very intentional.
This book lives in grief, trauma, and damage. Dax and Cassandra aren’t meant to be healed by love — they’re drawn together because they recognize the broken parts in each other, and that connection is messy, consuming, and often painful. Their relationship isn’t healthy, but it is powerful, and that tension drives the entire story.
Dax is hardened by war and loss, carrying his trauma in ways that spill into every interaction. Cassandra is fractured in a quieter but equally devastating way, desperate for something to anchor her when everything inside feels like it’s unraveling. Together, they hurt each other, cling to each other, and circle the same wounds again and again.
At times, the emotional repetition slowed the pacing for me, which is why this lands at four stars instead of five. That said, the intensity never felt accidental — this story wants you uncomfortable, exhausted, and emotionally wrung out right alongside the characters.
The ending is brutal and unresolved in a way that lingers long after the last page. This isn’t a book you finish and move on from easily.
If you’re looking for a dark military romance that leans hard into obsession, trauma bonds, and emotional devastation, this one absolutely delivers. Just make sure you’re in the right headspace before diving in.
Thank you to Calia Quinn for the opportunity to read and review this story.

I received a free copy of this book and am voluntarily leaving a review.

[addictedtodarkromance · Rating 5 out of 5]

Omg this book.... 😭🤯😶 Grab your tissues!

Cassandra's friend convinces her to go to The Starlight Club, for adults only, which is not usually her scene, but she agrees to go anyway. This is where she meets Dax for the first time. He can tell that the environment is not somewhere she typically surrounds herself in, and is drawing him in unintentionally.

Oh, Dax..... what a complicated guy. He's a mysterious MMC who's dominant, confident and deliciously seductive 🥵. He's hidden behind an impenetrable, sturdy wall for so long but she's thrown him off balance from the first time he sees her. To Dax, Cassandra is pure and soft yet powerful in a way she doesn't even know, and he feels a little uncomfortable that she's making him feel something.

Cassandra is innocent, hopeful and is strong in her own way. She's someone who puts her all into Dax and believes in their relationship. She had her heart trampled on more than once, and I felt her sadness, anger, confusion and disappointment from the events that broke her.

These are two people with traumatic pasts who felt seen by each other, which is all people want in this world. Their relationship worked against them from the beginning as it was built on false hope, shattered pieces, good intentions gone wrong and broken souls. But with all that hanging over them, they still have amazing chemistry and intense, spicy scenes. You can feel the passion and care they had for each other.
But life isn't linear. People make choices, things are out of their control and fairytale dream don't always come true. This book is a raw and real.

I generally don't pick up books that are open ended but Calia has a way of pulling me in, I love her stories. It took me a long time to write this book because I needed to process and gather my thoughts. I won't forget this book anytime soon!

Overall: 4.25 out of 5 ⭐⭐⭐⭐.25
Spice/Heat: 3 out of 5 🌶️🌶️ 🌶️
Main Characters: Dax & Cassandra
Nickname: Butterfly
Darkness: 2 out of 5 🖤🖤
Heartbreak: 💔💔💔💔💔
Type of book: MF, Fast Burn, Dual 1st Person POV
Reading Order: Standalone Novel
Title: Goodbye Butterfly
Epilogue: Yes
Ending Type: HFN - Open Ended


*PTSD
*War
*Trauma
*Very Emotional
*Heartbreak
*Previous Love of MMC
*Toxic Coping
*Mental Health Challenges
*No cheating or sharing


⚠️ This book has descriptive parts that may be triggering to some. Please check all the authors' TW/CW before reading! 18+

*I received an early copy of this book & am voluntarily leaving this review.

[Samantha Millican · Rating 5 out of 5]

This dark military romance is book one in The Broken Butterfly Duet that will brutally stomp your heart to pieces. With no promise of putting it back together again! Dax will do anything to keep his butterfly, Cassandra. But what is the cost? And will it be true or toxic? When you get to the end you’ll find out and also understand why it happened. It’s intense, emotional, and latches on to you with teeth so sharp you’ll gasp! If you’ve had the pleasure of reading anything by Quinn prior to this, you know she writes unrelenting dark stories. Psychologically twisted, intense trauma, emotionally complicated, unhinged obsession, and a toxic romance you can’t pull yourself away from! So it’s best you go to the content warnings for your mental health. Calia gives you many warnings, where the story is coming from, and always gives you a choice to continue reading or to simply walk away. It’s within these first pages where I decided I needed to read the story she is about to tell, because the place it comes from, deep within her soul, is what truly grabs me to continue.

I received a free copy of this book and am voluntarily leaving a review.

[bunny · Rating 4 out of 5]

Cassandra calling herself a butterfly feels a bit on the nose, but watching Dax try to pin her wings down was admittedly gripping. He is exactly the kind of scarred, obsessive soldier that makes you want to stage an intervention while simultaneously turning the next page. I appreciated that the military background actually felt grounded in his trauma rather than just being a cheap costume for the plot. The Seventh Sin setting provided a nice, moody backdrop for all the smoke and glass aesthetics that this genre loves so much. My main gripe is that Cassandra occasionally makes choices that had me questioning her survival instincts, though I suppose that is the point of a trauma bond. The pacing was steady, even if some of the possessive dialogue bordered on being a bit much. It is definitely not a light read, and the obsession levels are dialed up to an eleven. I am still deciding if I want to give Dax a hug or a restraining order, but the cliffhanger ending certainly made the choice more complicated. If you are looking for a healthy relationship, keep walking, because this is pure, unadulterated toxic chaos.

[Susan · Rating 4 out of 5]

Well this story just crushed me, I knew i was in for a rollercoaster of emotions with this one.
Dax and Cassandra were a disaster waiting to happen, their messy story was addicitive.

Dax Kingston isn't sweet or soft, nor is he full of tenderness and romance. He's seen to much and done worse, hes become battle hardened, unrecognisable even to himself.

Cassandra is broken on the inside, she wants Dax to fix her and she thinks she can fix him in return.
Together they are toxic, their obsession with each other is a dangerous monster. They hurt each other and come back for more.

OMG! these two, their passion and pain bled from the pages. Their tremulous love story left me emotionally exhausted. They both have underlying trauma, their love is a battlefield of chaos and unresolved issues. Their relationship isn't healthy but it's powerful, raw and all consuming.

That ending..... I'm left tormented with what ifs.
It was never going to end well but i still need to know more.

I wanted a story to make me feel and i definetly got it with Goodbye Butterfly. 🖤

[SJ · Rating 5 out of 5]

Extra intense, it will crawl under your skin and stay with you. You'll see all the red flags and still dive in willingly only to be left reeling.

This dark military romance is heavy on the trauma, emotional and psychological damage, despite that, I still put my heart into it and I couldn't put it down. Calia Quinn never ceases to successfully wreck me and yet I keep coming back for more because it's so worth the ride. This is the type of book that stays and lingers in the dark recesses' of your mind.

Dax and Cassandra are incredibly well-written characters with so many complexities. Their story is intense and all-consuming. The tension and passion alone were insane, I couldn't get enough of them. This is not a sweet love story this is heavy and toxic and will have you questioning your moral judgment. It's downright addictive and devastating.

Tropes:
Enemies-to-lovers
Obsessive/possessive anti-hero
Stalker
Protective
Slow-burn
Explicit/Graphic
Dual POV

Check TW

[Rachael · Rating 3 out of 5]

Her BFF has a brother she never told her about, because he's in the military and gone for long periods of time. Okay.
Girl meets boy, she falls, he walks away.
Boy follows girl, kisses another girl, then she walks away.
Repeat this over and over, and you have the storyline. She wants to stick up for herself, but he keeps telling her he's going to corrupt her.
I won't harp on the inaccurate military usage. He just got back from deployment, but is on 30 days leave? He's staying in a hotel for those 30 days? I know, it's fiction.
It's definitely full of angst.
Not the most.

I received a free copy of this book and am voluntarily leaving a review.

[The Book Ssirren · Rating 5 out of 5]

This book wrecked me in the most emotional kind of way. Dax and Cassandra were so broken. Each in their own way. Dax, ex military with severe PTSD. And Cassandra with her own problems. These two stuck with one another because they said the other made them feel better. You could see some toxicity between them, but at the same time there were perfect for one another.
This book was so gripping. So emotional. It couldn’t put this down. I need more. And I needed it yesterday.

I received a free copy of this book and am voluntarily leaving a review.

[Dawn · Rating 4 out of 5]

Dax Kingston is a battle-hardened man, while Cassandra is deeply broken and waiting for someone to put her back together. From the start, their relationship is toxic, driven by intense passion and tangled in pain that can be difficult to read at times.

The characters are well written and layered with complexity, making their connection feel raw and real. Their story is intense and all-consuming, pulling the reader into a dark emotional space where love and hurt are tightly intertwined.

I received a free copy of this book and am voluntarily leaving a review.

[Narelle · Rating 5 out of 5]

If you are looking a sweet, light and fluffy read DO NOT open this book, go elsewhere for those feelings as this book is so not that.
Dax and Cassandra's story will rip out your heart, stomp on it and maybe put some crumbs back into your chest for you. There is raw, real and messy pasts, presents and probably future. With military, trauma bonds, raw emotion, slow burn, healing and so much more, just prepare yourself for one h*#% of a ride!.

I received a free copy of this book and am voluntarily leaving a review.

[Calia Quinn]

Hello sinners, survivors, and soft hearts 🦋

Consider this your warning.
Goodbye Butterfly is not a pretty story with a pretty bow.
It’s messy.
It’s sharp.
It digs under your skin and whispers all the things you’re afraid to admit.

Dax is the storm.
Cassandra is the wreckage.
And the two of them together?
A disaster you’ll beg to watch unfold.

If you want safe love — skip this.
If you want a book that grabs you by the throat and makes you feel — welcome home.

🖤
Calia

[Melinda · Rating 5 out of 5]

🦋 Goodbye Butterfly — A Love That Breaks More Than It Heals

⭐️ 4.5 Stars

If you’re looking for a soft love story, this isn’t it. But if you want a book that will emotionally wreck you, Goodbye Butterfly is exactly that. Please check trigger warnings before reading.

This story lives in heartbreak. It’s dark, painful, and centered around two deeply broken souls who don’t heal each other so much as unravel together. Dax is a military man suffering from severe PTSD—his world is filled with screams, blood, and death. Cassandra is just as fractured, desperately wanting to escape the pain inside her own mind. She believes Dax is the one person who can complete her, and in many ways, she’s right… even if that connection comes at a cost.

As the story progresses, I did feel like certain moments became repetitive—Cassandra constantly asking Dax to ruin her, and Dax repeatedly insisting he needs to stay away while inevitably coming back. I genuinely think the book would have flowed better if some of those repeated sections were trimmed down, making the story tighter and more impactful.

That ending, though? Absolutely devastating. I finished the book staring at the final sentence thinking, how the fuck do you leave it like that? I wanted—no, needed—more. An extra scene, anything. It left me completely reeling.

This was my first book by Calia Quinn, and it definitely won’t be my last. I received this as an ARC, but I fully plan on buying a physical copy because this book deserves a permanent place on my shelf. I’m so glad I got to experience this story.

I received a free copy of this book and am voluntarily leaving a review.

[Allicia M · Rating 5 out of 5]

Story 4.75 ⭐
Spice 4.5 🌶️

Goodbye Butterfly is a dark military romance that will destroy you. It is a very emotional dark romance. Please read with caution.

I received a free copy of this book and am voluntarily leaving a review.

[Stefanie Verhelst · Rating 4 out of 5]

This story is about two people, fighting against their ghosts from the past.

Will their growing feelings, love cure them?

Strongly character driven, beautifully written!

Expect to be touched deeply!.

I received a free copy of this book and am voluntarily leaving a review.

[Lei Doyle · Rating 5 out of 5]

This book will rob the very breath from your soul and leave you emotionally and mentally wrecked. Quinn pulled out all the stops with this book. I am a complete mess of emotions and I'm not sure if I'll shake this by the time book two releases.

[Vivien Richards · Rating 5 out of 5]

This is Dax and Cassandra's story. If you love possessive over the top, st@lker type main male characters, then you will love this story. Dax is a dark possessive obsessed character but that's exactly how I like my anti-heroes. Loved this story!

[Amanda Grange · Rating 5 out of 5]

This gave me PTSD flashbacks to my own toxic (ex) relationship. My stomach was in knots throughout the book. Dax is the boy that every girl thinks she can fix, but he ends up destroying her. It was so emotional. I loved it.

[Tabitha Barberich · Rating 3 out of 5]

The writing style was not the greatest. Many lines/events were repeated a lot. The plot & storyline were all over the place.