Upton Sinclair Novels

“You signed the contract, Anna. You belong to me for one year.” Anna Montgomery thought she was marrying for love. She was wrong. Forced into an arranged marriage with ruthless billionaire Adrian Sinclair, she hoped to win his heart. Instead, she became just another pawn in his world of power and deception. When she found out the truth that his heart had always belonged to someone else, she was shattered. Heartbroken and humiliated, she walked away but fate had other plans. Now, years later, Adrian is back. More ruthless. More possessive and he just discovered Anna’s biggest secret. The child she never told him about. She swore she would never fall for him again. He swore he would never lose her a second time. Love. Betrayal. Desire and a past that refuses to stay buried.

Content Warning: This book contains sexually explicit material and is intended for readers aged 18 and above. "I’m engaged to your sister. You can’t do this." His dark-green eyes bored into mine under the sheets, as he stroked my cheeks. "You’re not even into women, Liam. You know you’re not. You know you want this. You want me." And Liam couldn't deny it, He lived to burn for Jackson Maddox. ~ Liam Sinclair had always lived according to his father’s rules, polished, quiet, and hidden in the perfect image of a future CEO. Behind closed doors, he carried a secret that could destroy everything his father built. He was gay. But scandal had no place in the Sinclair legacy, and Liam made sure no one ever found out. That is, until the night everything changed. When his father arranges an engagement with Avery Maddox, a woman Liam barely knows, he unravels. A single night of rebellion leads him to a club, where a one-night stand with a seductive green-eyed stranger spirals into something far more complicated. The next morning, the stranger's identity is no longer a mystery. His name is Jackson Humin Maddox, the brother of his intending Fiancee. Now Liam is trapped between duty and desire, legacy and love. But Jackson doesn’t care about titles or contracts. Engaged or not, he wants Liam, and he is not letting go. This is a forbidden tango of chemistry, but Liam Sinclair has to choose, to either pretend his one time mistake was baseless, or to fall maddeningly in love with it.

Sloan Vale isn’t just a billionaire—he’s a king in a world built on whispered names, silk-bound power, and decadent sin. By day, he’s untouchable. Polished. Controlled. But by night, he rules The Crimson Order, a secret society where the elite indulge their darkest desires and make deals sealed with blood and pleasure. He’s never had a reason to break his own rules. Until her. Ivy Sinclair is a broke, brilliant art student just trying to survive. When she delivers a painting to an exclusive event, she stumbles into a hidden world she was never meant to see. Sloan’s world. The moment he lays eyes on her, he knows she doesn’t belong. Too innocent. Too pure. Too tempting. She should have run. He should have let her. But instead, he offers her a choice: walk away and forget what she saw… or surrender to him and learn just how deep the rabbit hole goes. Ivy agrees but she’s not as innocent as she seems. As Sloan draws her deeper into his dangerous orbit, he finds himself addicted to her softness, her fire, her secrets. She awakens something in him that’s been dormant far too long. Obsession. Protection. Lust. But Ivy didn’t stumble into his world by accident. She’s running from something darker. Something deadly. And when her past collides with his empire, both of them will have to decide what’s worth more: power or passion. Vengeance or love. In a world where everything comes with a price… will she be his salvation, or his ultimate ruin?

Evelyn Sinclair was the epitome of grace and sophistication, groomed to inherit her family’s prestigious legacy. But one fateful night, she was drugged and set up, leading to a scandal that shattered her world. With her fiancé canceling their engagement and her father stripping her of her heiress title, Evelyn found herself cast out of her family and forced to raise her twins abroad, far from the life she once knew. Years later, she returns to New Santerra, determined to provide a stable life for her children. However, fate has other plans when she discovers that the stoic CEO of the company she just joined is none other than Adam Dean—the man she had a one-night stand with, the one who unknowingly holds the key to her tumultuous past. “Sir, please watch your manners!” she challenges, her eyes blazing with defiance. Adam’s expression remains impassive, but his voice is low and intense. “This is my office. Who’s going to stop me if I want you here, right now?”

-Kehlani,  an avid writer who spends most of her time publishing bestselling romance novels wants to write a new whole genre for a change and to this effect she decides to embark on writing a fantasy based fictional romance which she had never done before, mostly to honour her late grandmother who was a fan of such a genre. Kehlani embarks on a journey to her grandmother’s hometown for various reason: firstly as a form of reflection due to her grandmother’s one year anniversary and secondly because she needed a sabbatical in a quiet place which was in tune with nature to enable her work on this said Manuscript and possibly gather inspirations. - Kehlani arrives at Woodbine only to discover that this town is cut away from, the world in every sense of it. It seemed like their town was stuck in time as even the little stories her grandmother had told her and it's landmark still remained. Kehlani takes advantage of this and decides to take an interest in the townspeople who only farmed and jollied  as she felt that it might form an inspirational framework for her new Fantasy Manuscript.

Violet Willson thought she had everything — a sweet family, a job and a loving boyfriend. But her world came crashing down when she caught her man with another lady in bed and worse, he wasn’t even remorseful. Shuffling into the night with a broken heart, she didn’t expect to encounter a mysterious, dead-gorgeous man who was seriously injured. Alpha Axel Sinclair stumbled upon some rogues the night he was coming from his run in the woods. Outnumbered, he was left almost dead. Luckily, his life was saved by Violet. However, as fate would have it, he mistook another person to be his savior and now he was left in a dilemma on whom to choose. The one whom he presumed to be his savior, or Violet who was surprisingly his fated mate?

Elena Sinclair, an ambitious investigative journalist, wakes up after a reckless one-night stand with a dangerously attractive stranger—only to discover he is none other than Dominic Caldwell, the ruthless billionaire CEO of Caldwell Enterprises and the sworn enemy of her family. Before she can fully process her mistake, she learns that her father, a powerful senator, has secretly arranged her marriage—to Dominic. The shocking revelation sends her life into chaos, but when her father’s political career is threatened by a dark scandal, she’s given a choice: marry Dominic to secure her family’s reputation or risk losing everything. What she doesn’t know is that Dominic has his own motives for the marriage. What starts as a forced arrangement quickly turns into a war of wills. Passion ignites, secrets unravel, and their mutual hatred becomes something far more dangerous. But there’s one more secret—Dominic is hiding a forbidden connection that could shatter everything Elena believes about love, trust, and betrayal.

In the bustling city of Metro Haven, where life never slows down and dreams hang ripe for the picking, Maya Thompson stands out as your quintessential college student. Balancing a hectic schedule of classes and a part-time job at a marketing firm, she embodies the hustle of urban life. Maya's world revolves around her tight-knit circle of friends: Emma Kensington, the epitome of sophistication and intellect, seemingly born into old money; Alex Tung , the ambitious finance aficionado climbing the ladder; Jordan Wu, the tech prodigy driven by familial pride and mastery of coding; and Taylor Sinclair, the fashion maven capable of crafting style with her eyes closed. Together, they navigate the highs and lows of college existence, from intense lectures to raucous parties and late-night study sessions. But the dynamics shift when Maya attracts the attention of Liam Harrington, a seasoned CEO with a wealth of connections that rival the campus Wi-Fi network. Liam exudes an air of mystery, his experiences hinting at a life far beyond the college scene. Maya finds herself drawn to him, but Liam guards his emotions closely, wary of revealing his affections for a college student when he inhabits a world of established success. As Maya grapples with the complexities of friendship, academia, and her burgeoning feelings for Liam, she discovers that love transcends age and social status. It's about the undeniable pull that sets your heart racing and your world spinning.

Isabella Sinclair bears the surname of the second richest and most prestigious family in the country, but only that. His father was banished from the prominent family, for marrying his mother, a woman of humble origins. Which is why Isabella has never had any contact with her father's family. At just the age of ten, Isabella has been left alone and helpless, living on the street, because her parents have died and the bank has taken everything from her, due to the accumulated debts. Isabella's whole world has fallen apart, when something incredible happens. She receives a letter from her father's family, the wealthy Sinclair’s, inviting her to a unique family reunion, which will take place on a two-week cruise. Not having a roof over her head, Isabella decides to go without knowing the turn her life will take during this short trip, will meeting the Sinclair’s mean her salvation or her downfall?

When Luke agreed to marry Lucy Radcliffe to secure his inheritance, Eva had no choice but to walk away. But fate has a twisted sense of humor. Lucy, determined to spite Eva, hires her as the wedding planner for the very event that broke her heart. Despite the pain, Eva takes the job, knowing it’s the perfect opportunity to elevate her brand. But as the wedding preparations force Eva and Luke into close proximity, old feelings resurface, and Luke begins to question his choices. Torn between his duty to his family and his rekindled love for Eva, Luke finds himself in a web of desire and obligation. Enter Gavin Sinclair, Lucy’s arrogant billionaire cousin, who becomes smitten with Eva at first sight. As Gavin relentlessly pursues her, Eva finds herself caught in a tangled love triangle—or perhaps a love quadrangle—where emotions run high, and the stakes are even higher.