Mariah Sinclair Novels & Stories

“If you leave here now, consider this marriage over!” “Anna.” Davy gasped, his eyes searching mine, but I folded my arms, my resolve unwavering. “You don’t mean this. Look, I will only spend a day, and I will be back to you.” “If you walk out that door, you might as well call a lawyer, because the next time you see me will be in court.” I repeated slowly, firmly, staring straight into his eyes so he knew I wasn’t bluffing. “It’s your choice.” The air between us was thick, almost suffocating and I held my breath, waiting for him to choose. But I should have known this was Davy. There was no hesitation in his eyes as he turned his back on me and walked away. *** There was one thing Anna Sinclair hated more than the color yellow: her husband’s profession. And there was one thing Davy Hale Walton loved more than his wife: that same profession. But how will they coexist?

Ava Sinclair is a respected lawyer well-known for her tenacity and sharp intellect, but when Roman Devereux—a dangerously charismatic billionaire hires her to defend him against charges of corporate spying, all her once-clear lines blur. Roman’s charm drags her into his dazzling world, but as Ava dives deeper into his case, she learns a stunning truth: Roman staged his arrest to manipulate her into helping him ruin her distanced mother’s empire. Heartbroken, Ava walks away, only to find herself caught in the crosshairs of Roman’s enemies. As her career and life collapse, Roman risks everything to protect her. Yet Ava isn’t pleased with being protected—she turns Roman’s own vicious techniques against his adversaries, proving her strength in a shocking act of payback. But when the dust settles, Ava must decide: can she forgive Roman, or will she destroy him and everything that comes with him to protect herself?

She asked her best friend to take her virginity. He said no—at first. Eighteen-year-old Wren Sinclair has always played the good girl—smart, responsible, careful. But a month to her birthday, she asks her best friend for the one thing no one would expect from her: sex. Just once. Just to get it over with. Except Kai Anderson—gorgeous, cocky, and maddeningly protective—doesn’t play by simple rules. Saying yes might wreck the most important relationship in his life. Saying no? That only makes the fire between them burn hotter. As stolen touches, whispered lessons, and forbidden fantasies begin to blur the lines between friendship and something far more dangerous, Wren finds herself spiraling. Her body wants everything Kai offers. Her heart is starting to want even more. Because falling for your best friend? That was never part of the plan. A sizzling slow burn filled with banter, heartbreak, and back-to-back sexual tension.

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.

Emily Carter thought heartbreak would be the end of her story—but it was only the beginning. After catching her long-term boyfriend cheating, she walks away shattered, determined never to look back. But fate has other plans when she crosses paths with Ethan Sinclair—her ex’s older, enigmatic brother—at a high-profile gala. Ethan is everything Daniel wasn’t: powerful, reserved, and dangerously captivating. He’s also off-limits. Yet when a single glance turns into a stolen kiss, Emily finds herself drawn into a world of secrets, passion, and power plays. But in Ethan’s world, nothing is simple. Public image is everything, and Emily quickly learns that being with him means staying hidden in the shadows. As emotions deepen and their secret affair intensifies, Emily must ask herself—how long can she be someone’s secret before she forgets her own worth? A story of forbidden desire, dangerous power, and the cost of loving a man who was never supposed to be hers.

He broke her heart once. Now, he’s her husband. And someone else is willing to destroy everything to have her. Forced into a contract marriage with her ex, billionaire Adrian Ferraro, Alina Sinclair swears she’ll never forgive him. What begins as cold hatred soon stirs old feelings neither of them can deny, but Adrian’s world is built on blood and secrets. And in the shadows waits Leon Ferraro, Adrian’s stepbrother. Addicted, dangerous, and obsessed, Leon will burn their lives to the ground if that’s what it takes to claim Alina for himself. Torn between the man who betrayed her and the man who stalks her, between a love that hurts and an obsession that destroys, Alina must fight for her career, her family, and her life. But when illness strikes and her child’s fate depends on the Ferraros, one truth becomes painfully clear: love isn’t the only thing worth bleeding for. Her ex-husband wants her heart. His brother wants her soul.

My wife, Wendy Sinclair, has a severe sleepwalking disorder. After she falls asleep, she always wanders out in a state of unconsciousness. The night before our wedding, she disappears without a word. I have no choice but to postpone our wedding. Only then does she walk out of her childhood friend's house next door, rubbing her sleepy eyes. Afraid I might overthink, she cries and apologizes to me. "There's no cure for my condition. From now on, just tie me up when I sleep, okay?" I feel sorry for her, so I just change the door lock to make sure she cannot go out. But in the middle of the night, I wake up and see her standing on the edge of the balcony. She climbs in through the window and goes into her childhood friend's house again. Soon, suggestive and intimate sounds come from inside. My blood runs cold. Her sleepwalking isn't an illness at all—it is out of love.

Melanie Campbell was someone who loved keeping to herself and while sending numerous applications to several places, she made a small living working as a waitress in a tiny restaurant to earn as much as she could to provide for herself and her ailing grandmother. With the recommendation of her close friend, she applied for and gets called into an interview where she met him… Calvin Sinclair was the heir to his parents' group of companies after the unfortunate demise of his older brother and he worked exceedingly hard to be just as perfect at his job as his brother would have been, even agreeing to an engagement to a famous model and family friend, Linda Thorne. He comes across Melanie who is hired as his personal assistant and who has an unmistakable resemblance to his fiancée, Linda and he is intrigued. Will the two end up falling hopelessly in live with each other despite their difference in backgrounds and what is expected of them? Or will they settle for what they are told to have and be with the people who would benefit them the most?

When Vera Sinclair’s longtime boyfriend dumps her for the heiress she unknowingly replaced, she’s devastated but not broken. For years, she played the role of the perfect girlfriend, filling in the gaps while he pined for another woman. But now? She’s done being second best. Just when she thinks she’s free, a powerful billionaire, Asher Donovan enters the picture with an intriguing proposition. He needs a fiancée to silence his family’s constant matchmaking, and Vera, with her newfound indifference to love, is the perfect candidate. But Asher isn’t just any billionaire, he’s her ex’s former business rival, the one man who can make her ex regret ever letting her go. As Vera steps into the world of high society on her own terms, she realizes that being a “substitute” was never her destiny. She was meant to be someone’s first choice. And this time, love might just come with the sweetest revenge.

After five years with Nathaniel Sinclair, Sylvia Garner thought their love would lead to a lifelong commitment. But when Nathaniel postponed their wedding, her world began to crumble. At a private club, Sylvia stumbled upon a scene that shattered her heart—Nathaniel down on one knee, proposing to another woman. “You’ve been with Sylvia for five years, but now you’re suddenly marrying Vivian Hayes. Aren’t you afraid she’ll be upset?” someone asked. Nathaniel shrugged it off. “Vivian is ill; this is her dying wish. Sylvia loves me too much to leave.” The whole world knew Sylvia loved Nathaniel to the point of obsession, believing she couldn’t live without him. But this time, he was wrong. On the day of his wedding, he told his friend, “Keep an eye on Sylvia. Don’t let her know I’m marrying someone else!” His friend froze. “Sylvia is getting married today too. Didn’t you know?” At that moment, Nathaniel broke down.