If you are a fan of alpha antiheroes, intense power dynamics, and unapologetically steamy storylines like those from J.T. Geissinger, Rina Kent, or Ana Huang, Sadie Kincaid belongs at the very top of your reading list. Kincaid has rapidly built a massive global readership by mastering the art of dark mafia romance, reverse harem (why-choose) dynamics, and high-concept paranormal romance.
Because her contemporary mafia families frequently cross paths, share bloodlines, and interact within the same criminal underground, reading her books within their specific series order is crucial to tracking the overarching timelines.
The Ultimate Reading Vibe: What to Expect
Before you step into the criminal underworld, here are the core pillars that define a Sadie Kincaid romance:
- Morally Gray Alpha Heroes: Her male leads are dangerous, fiercely protective, and deeply possessive enforcers, bosses, and billionaires who will burn down the world for the women they love.
- Fierce Heroines & Forbidden Tropes: From forced proximity and fake relationships to dangerous arrangements, her heroines navigate extreme stakes without losing their inner resilience.
1. New York Ruthless Series (The Ryan Family)
This is Sadie Kincaid’s flagship contemporary dark romance series. It introduces the brutal, highly protective Ryan brothers and features a dominant reverse harem dynamic. The main storyline spans the first five books, followed by a series of extended novellas, short stories, and companion pieces that track the family’s legacy.
- 1. Ryan Rule (2021)
- 2. Ryan Redemption (2021)
- 3. Ryan Retribution (2022)
- 4. Ryan Reign (2022)
- 5. Ryan Renewed (2022)
- 6. A Ryan Recollection (2023)
- 7. A Ryan Reckoning (2023)
- 8. A Ryan Revelation (2023)
- 9. A Ryan Review (2023)
- 10. Another Ryan Christmas (2023)
- 11. A Ryan Regret (2024)
2. Chicago Ruthless Series
Shifting the criminal focus to the windy city, this series follows the lethal enforcers and bosses of the Chicago Cosa Nostra. These are darker, deeply emotional, more traditional M/F mafia standalones that center on childhood crushes, forbidden loyalty, and revenge.
- 1. Dante (2023)
- 2. Joey (2023)
- 3. Lorenzo (2023)
- 4. Keres (2024)
3. L.A. Ruthless Series
This highly popular, high-tension four-book series takes readers out to the West Coast, focusing on ruthless underworld kings ruling Los Angeles.
- 1. Fierce King (2021)
- 2. Fierce Queen (2021)
- 3. Fierce Betrayal (2022)
- 4. Fierce Obsession (2022)
4. Manhattan Ruthless Series
Set against the glamorous backdrop of New York high society and billionaire empires, this series blends office dynamics, second-chance romance, and elite family betrayals.
- 1. Broken (2024)
- 2. Promise Me Forever (2025)
- 3. Rebound (2025)
- 4. Played (2025)
- 5. Made (2026)
5. Broken Bloodlines Series (Paranormal Romance)
Stepping completely out of the contemporary mafia underworld, Kincaid crafts a high-stakes, dark urban fantasy and paranormal romance saga centered around vampires, dragons, ancient prophecies, and fated mates.
- 0.5. Born in Blood (2024) – Prequel novella.
- 1. Forged in Blood (2024)
- 2. Promised in Blood (2024)
- 3. Bound in Blood (2025)
6. London Ruthless & Other Series
London Ruthless Series
- 1. Dark Angel (2021)
- 2. Fallen Angel (2021)
Bound and Broken Series
- 1. Bound and Shared (2021)
- 2. Bound and Deceived (2022)
- 3. Bound and Tamed (2022)
A Curse of Blood Duet (Co-authored with L.J. Morrow)
- 1. Cursebound (2025)
- 2. Unbound (2026)
7. Standalones & New 2026 Series Launches
- The Perfect Fit (2023) – Her highly acclaimed contemporary reverse harem standalone novel.
- My First Mistake (2025) – A forced-proximity, second-chance cabin romance.
- Heart of a Devil (2025) – A forbidden, dark age-gap London romance.
- The Auction (April 2026) – The explosive first novel in her brand new “Wages of Sin” dark billionaire series.
- The Game (November 2026) – The highly anticipated second book in the Wages of Sin universe.
- King of War (August 2026) – The debut of her brand new fantasy romance series, “Las Vegas Ruthless.”

Frequently Asked Questions
What is Sadie Kincaid’s most popular book?
While the New York Ruthless series put her on the map, The Perfect Fit is widely considered her massive standalone breakout hit. Its masterfully written why-choose dynamic and intense character chemistry made it a viral favorite across dark romance communities.
Do I have to read the different “Ruthless” locations in order?
Not strictly. You can read Chicago Ruthless completely independently of L.A. Ruthless or New York Ruthless. However, reading the internal books within a specific city’s series in order is highly recommended, as the family plots, character relationships, and overarching underworld conflicts build directly on previous books.
Final Thoughts: The Ultimate Romance Marathon
Sadie Kincaid delivers everything a dark romance reader looks for: high emotional stakes, fiercely loyal protagonists, and unputdownable pacing. Whether you want to jump into the grit of the New York Ruthless underworld or explore the fantasy realms of Broken Bloodlines, her books guarantee an addictive escape. Grab a copy of Ryan Rule or brave the mysteries of The Auction to begin your binge today!
Know Your Author
Hi, I’m Emon
I’m the voice and heart behind Whimsy Read. After nine years in the world of banking, I followed my passion for storytelling into the world of SEO and content strategy. Now, I blend that analytical eye with a deep love for literature to bring you book reviews that are thoughtful, honest, and always focused on the stories that stay with you.
When I’m not reading or writing, you’ll find me enjoying joyful chaos with my wife and three kids, getting lost in a new series, or revisiting my old loves: theater, music, and gaming. At the end of the day, I believe great books are meant to be shared, and I’m so glad you’re here to share them with me.






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