Jm Sinclair Novels & Stories

Alpha Atticus and his friend, Duke Paul Alexander, made a promise. When the Alpha has to assumed his friend's place at the court of Valira, he did not expect to find his fated mate, Lady Viviane Sinclair, betrothed in an arranged marriage to Prince Philip, the duke's nephew. Alpha Atticus is torn between his fated mate and honoring his promise to the Duke. "After making that oath years ago, I'm now bound to help the Prince get married and be crowned.” One promise that changed everything, one chance of having a fated mate and the one decision that will determine his future. Start following Alpha's Unexpected Bride, a fantasy romance with plenty of steamy scenes and HEA.

The story of Kiran Sinclair continues in Gravity. he returns to find his pack in danger and discovers that while he was healing himself, he lost the one thing most precious to him. Old enemies are still there and planning his demise. Adrian Peters goes on a rampage to kill the one wolf he really wants, Kiran Sinclair. Kiran's life is turned upside down when four-year-old Christian comes to live with them. The little boy fills the emptiness in Kiran's heart and while a new enemy arises, things seem to work out for Kiran. Life's not always what it seems and Kiran will soon realize that his family secrets run deeper than he ever thought when Death shows him the future that awaits him.

At Monticello Senior High, power has always belonged to Maddox—the merciless Alpha who rules with dominance and fear. But everything changes when Mordred Sinclair, the rebel biker with a dark, untamed past, rides into town. Kiana never imagined she would be the fire that sparks a rivalry between them. Already scarred by betrayal and struggling to survive her own demons, she becomes the center of an obsession neither boy can walk away from. One promises protection through dominance. The other offers freedom through danger. But both demand her heart. As secrets unravel and loyalties are tested, Kiana must choose between the Alpha’s claim and the biker’s desire—before the war between them consumes her whole world.

“Your husband will never find out, as far as I keep my mouth shut and you do as well unless you’re moaning my name, that’s the only time you’re allowed to open your mouth about me to him.” Bella Sinclair has always been a sad wife to a man who hated her and couldn’t stand her existence. A night out alone turned to her getting her brains fucked out by a one night stand who ended up being her husband’s best friend. How would she cope knowing she loves her husband and this new addition to her life has suddenly become an irresistible addiction:

I never expected my boss to blackmail me into marriage. Ethan Sinclair the cold, calculating billionaire who never cracks a smile holds a secret over my head, forcing me into a fake marriage to secure his family’s inheritance. I hate him for it, but I need the money to save my brother’s life. The rules are simple: play the devoted wife for a year, follow his lead in public, and stay out of his way behind closed doors. But as sparks fly and buried secrets unravel, I realize Ethan isn’t just ruthless, he’s hiding something even more dangerous. The closer I get, the harder it becomes to remember this is all just a contract. Because falling for the devil was never part of the deal.

After struggling with infertility for years and being betrayed by her lover, Ella finally decides to have a baby on her own. However everything goes wrong when she gets inseminated with the sperm of intimidating billionaire Dominic Sinclair. All of a sudden her life is turned upside down when the mix up comes to light -- especially because Sinclair isn't just any billionaire, he's also a werewolf campaigning to be Alpha King! He's not going to let just anyone have his pup, can Ella convince him to let her stay in her child's life? And why is he always looking at her like she's his next meal?! He couldn't be interested in a human, could he?

She was always the good girl. Until heartbreak made her reckless. Elena Sinclair thought marriage meant forever. But five years in, her “forever” has become a gilded cage of pain and betrayal. She’s the wife who couldn’t give him a child. The barren disappointment. And for that, her husband offered her a cruel compromise… an open marriage. One that gave him the right to find someone who could carry his heir. The next day, he brought a pregnant woman home. The same woman who was first introduced as his cousin. The humiliation doesn’t end there, his mother lashes out… hurling insults and even fists, while her husband turns a blind eye. Not once has he defended her. Not once has he shown her love. She’s nothing more than a placeholder… a name on a marriage certificate. The cruelest part? She loved him. She loved him long before the vows, long before the lies… so deeply it blinded her to who he really was. Now, to make him jealous, she turns to the one man she should never touch: Jaxx Moretti, her husband’s younger brother. The dangerous one. The black sheep of the Sinclair family. The man who once made her high school years hell… and now has every reason to destroy her husband's legacy. What starts as a twisted game soon ignites into something raw, addictive, and completely forbidden. But Jaxx isn’t just her escape. He’s everything her husband isn’t. Because the deeper she sinks into Jaxx's bed… The harder it becomes to crawl back out. Content Warning: This book contains mature themes intended for adult audiences (18+), including explicit sexual content, toxic relationships, manipulation, and emotional trauma. Reader discretion is strongly advised.

Isla Caldwell's life was a struggle, juggling part time jobs to support her family after her father's layoff to her been betrayed by her boyfriend. But everything changed when she met Professor Sebastian Sinclair, a young, handsome, and wealthy artist hiding behind his academic facade. Their explosive one night stand ignited a forbidden attraction, complicated by Sebastian's secret: he's the anonymous nude artist famous worldwide and the only heir to a billionaire mogul, and he's determined to make Isla his muse. As they navigate their illicit love affair, secrets unravel, and danger lurks from ex boyfriend Liam's obsession to Sebastian's ruthless father, who's desperate to control his son's future. Can they find a way to make their forbidden love survive?

Evangeline Fiore, a powerful executive with a secret past, is compelled to marry Adrian Sinclair, a stoic architect bound by duty. Their arranged union, orchestrated by their grandfathers, is himself devoid of affection. Adrian warns Evie not to expect love, but as they share their first home, he finds captivated by her hidden talents and fierce spirit. Evie, due to the coldness of Adrain, went to a pub and drank herself to stupor. She had a passionate one night stand with a stranger, which led to pregnancy. Adrian's charming friend, Nate, sets his sights on Evie, creating a playful yet tense love triangle. When the truth about Evie's wealth is revealed, will the foundation of their marriage crumble? Can duty blossom into love, or will hidden desires lead them down separate paths? Will the baby identity be known ? Or forever be Adrain’s

One unforgettable night. Two men. A choice to make Lila Bennett’s life is turned upside down when a one-night stand with the emotionally cold billionaire Drew Sinclair leads to a shocking pregnancy. Fearing rejection for the second time, Lila keeps the pregnancy a secret, believing Drew would never accept her or the child. But when Lila’s old friend Max, a successful art mogul, finds out, he offers to marry her and take care of the baby. Lila is torn, She still has lingering feelings for Drew who's cold and has made it clear that the encounter with her was a mistake and there's Max who's offering all the support she needs. Who will she choose? Could there be more to what Lila is seeing on the surface? Find out in this thrilling and exciting book.