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  • King of Obsession : A Dark Mafia Enemies-to-Lovers Romance (Kings of the Underworld Book 1)

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King of Obsession : A Dark Mafia Enemies-to-Lovers Romance (Kings of the Underworld Book 1) Kindle Edition

by Bianca Borell (Author) Format: Kindle Edition
4.2 out of 5 stars (72)
She was sent to kill him. He was built to possess her.

In the shadows of the Underworld, Luciana is the Council’s deadliest assassin–silent, lethal, unshakeable.

Until Enzo Ferrara. The ruthless billionaire mafia heir who should be a corpse… but instead becomes her obsession.

He mocks her. Tempts her. Hunts her.
And when she hesitates on the kill shot, a dangerous game begins–one fueled by captivity, betrayal, forbidden desire, and a chemistry sharp enough to cut.

Enzo should destroy her for coming after him.
Instead, he wants to crown her his queen.

But in a world built on blood and vengeance, love is a liability–and betrayal demands retribution.
Their passion is incendiary. Their sins unforgivable.
And only one of them walks away unscathed.

A dangerous, intoxicating enemies-to-lovers dark mafia romance standalone featuring an obsessed anti-hero, a lethal heroine, forced proximity, revenge, betrayal, and a love that destroys everything in its path.
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  1. Book 1 of 4
    Kings of the Underworld
  2. Print length
    386 pages
  3. Language
    English
  4. Accessibility
    Learn more
  5. Publication date
    June 25, 2025
  6. File size
    1.8 MB
  7. Page Flip
    Enabled
  8. Word Wise
    Enabled
  9. Enhanced typesetting
    Enabled
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Product details

  • ASIN ‏ : ‎ B0F99GF33T
  • Accessibility ‏ : ‎ Learn more
  • Publication date ‏ : ‎ June 25, 2025
  • Language ‏ : ‎ English
  • File size ‏ : ‎ 1.8 MB
  • Screen Reader ‏ : ‎ Supported
  • Enhanced typesetting ‏ : ‎ Enabled
  • X-Ray ‏ : ‎ Not Enabled
  • Word Wise ‏ : ‎ Enabled
  • Print length ‏ : ‎ 386 pages
  • ISBN-13 ‏ : ‎ 978-3911317092
  • Page Flip ‏ : ‎ Enabled
  • Book 1 of 4 ‏ : ‎ Kings of the Underworld
  • Best Sellers Rank: #151,689 in Kindle Store (See Top 100 in Kindle Store)
  • Customer Reviews:
    4.2 out of 5 stars (72)

About the author

Follow authors to get new release updates, plus improved recommendations.
Bianca Borell

Bianca Borell

Brief content visible, double tap to read full content.
Full content visible, double tap to read brief content.

Bianca Borell is a contemporary romance author, voracious reader, nature lover, and unapologetic daydreamer. She spends her nights deciding between getting up to write or trying to silence the voices of her characters. The battle is never-ending.

She has a weakness for tormented characters, second chances, and happy endings.

She currently lives in Germany with her amazing husband and indulges in way too many pastries than she should.

For updates, news, and releases, be sure to visit Bianca’s official website at www.biancaborell.com

Follow Bianca here: https://linktr.ee/BiancaBorell

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Customer reviews

4.2 out of 5 stars
72 global ratings

Top reviews from the United States

  • Karen McVino
    5.0 out of 5 stars Dark, decadent, thrilling, and twisty … my obsession!
    Reviewed in the United States on March 16, 2026
    Format: KindleVerified Purchase
    Holy heart racer! I love my love stories laced with danger and Bianca Borell’s King of Obsession delivers all the way. This book had me in the biggest chokehold from beginning to end. King of Obsession is a savage beast that burns with fire and feels, and I reveled in this romance. UTTERLY INTENSE and INTOXICATING.

    King of Obsession is a love story meets mafia romance where the hero and heroine must unalive each other. This dark romance rules where a mafia king and queen battle demons and darkness, a hero and heroine destined to be one. Enzo hero and Luciana were created for each other. I could feel their chemistry, deep connection, and love explode through the pages. I was so addicted to this couple!

    Enzo is hero goals!
    🔥 Mafia don who is downright lethal
    🔥 Smokin’ hot, all alpha anti-hero
    🔥 Protective persona
    🔥 My undoing!

    Luciana is admirable as she navigates a traumatic past.
    👑 Assassin
    👑 Stunning
    👑 Strong
    👑 Gives as good as she gets

    King of Obsession is a heart-racing roller coaster of a romance felt everywhere. It’s dark, decadent, thrilling, and twisty. A heady mix of pain and pleasure woven with love that made my pulse pound and my heart race the whole time reading. The secrets … twists … cat and mouse games … electric banter … undeniable connection … and the insane intensity … I was undone! King of Obsession was my obsession indeed.

    💋💋💋💋💋 silver death kisses
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  • Kindle Customer
    5.0 out of 5 stars King of Obsession
    Reviewed in the United States on October 18, 2025
    Format: KindleVerified Purchase
    Loved it!!!!!
    Please tell there are others coming.
    I am reading all your books now, so glad I found you.
    Helpful
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  • Roni
    4.0 out of 5 stars Wow!!
    Reviewed in the United States on June 28, 2025
    Format: Kindle
    King of Obsession by Bianca Borell is book 1 in the Kings of the Underworld series. This is a Dark Mafia Romance that follows the journey of Luciana Rossi and Enzo Ferrara. There are trigger warnings so peep those before you start.

    Luciana Rossi, aka Silver Death, at 13 years old she is offered an opportunity to become a trained assassin by Augustus Ducati, leader of the Underworld Council. Not knowing who her family was and where she came from she knew this was the only path to get out of the orphanage. She is a fierce assassin, never been in love, never missed a target and only has one goal…search for her origin. Her life is completely changed when she receives an order to kill Enzo Ferrara, Mafia Boss of the West Coast.

    Enzo Ferrara, Mafia Boss, head of his family, son, brother and best friend to the Bratva Pakhan Mikail Morozov. He took over the family after the sudden death of his father and runs the underworld business with his best friend. He is bored with life but that all changes when he gets word that the Councils best assassin was given orders to kill him. He takes the news with excitement and considers it challenge, that is until he feels this unexpected pull and attraction to the beautiful and sultry assassin, Luciana.

    Before I give you my thoughts you should know that Dark Mafia Romance is my absolute favorite genre so I tend to be a little critical with my reviews due to my own personal expectations. With that being said….WOOOOOW. This book is sooo good. I couldn’t stop reading it, it has lived rent free in my head since I finished it. Their chemistry is amazing and intense. You have love, betrayal, violence, the underworld, a major plot twist …and a HEA, if this is something you tend to enjoy then I think you would love this book too. I’m ready for the next book, I hope it’s Mikails storyline. Go read this, you will not regret it 💫

    I received an advance review copy and I am leaving this review voluntarily.
    One person found this helpful
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  • Brooke Torrey
    5.0 out of 5 stars This book has me obsessed!!!
    Reviewed in the United States on January 26, 2026
    Format: Kindle
    What an exciting and wild ride of a book!!!! Bianca Borell has done it again with a new series called the Underworld Kings. This book took me on a ride that I didn't want to get off of. I loved the BA FMC and the dark and twisted MMC of this book. They definitely matched each other's energy. They were well written and had an intense and undeniable chemistry. I enjoyed the back-and-forth banter between them and loved the enemies-to-lovers trope. This book is a dark mafia romance and touches on dark themes and topics, so check the CW to make sure this book is for you. The storyline is original, page-turning, and filled with drama, suspense, mystery, angst, and spice!!! This book had me up all night wanting to know what would happen next.

    Luciana is a total BA!!! I loved her stubbornness and determination in this book. She was a force to be reckoned with, and she never gave up. Enzo was tall, dark, and broody. I loved his Alphaness and his dirty mouth. I enjoyed the cat and mouse game they both played in this book, and when they were caught, it was hot!!! This book kept me on the edge of my seat with all the mystery and suspense. I can't wait to see what happens next in this series!!!
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