Upton Sinclair Novels

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

In the competitive world of business, Nathaniel Sinclair and Cassandra's lives collide unexpectedly. Nathaniel, a driven businessman, offers Cassandra a job despite her lack of qualifications. What starts as a transactional arrangement evolves into a journey of mutual discovery and tenacity. Amidst office politics and family pressures, their bond deepens during a transformative business trip to New York City. Despite years of separation and challenges, their love story ultimately triumphs, culminating in a reunion that redefines their future together, marked by forgiveness, redemption, and the joy of married life.

Isabella Rossi thought the worst thing in the world was losing her boyfriend to her best friend. She was wrong. Her best friend handed her to another man. Drugged. Betrayed. Claimed. She woke up under the cold, ruthless body of a stranger—only he wasn’t a stranger at all. Vincent Sinclair: her company’s new CEO, heir to one of Manhattan’s most elite dynasties… and her ex-best friend Chloe’s older brother. He doesn’t remember her face. He's nothing but an entitled playboy...or so she believes He thought she was just another social climber. She thought she’d only lost her innocence. Until two pink lines shattered everything. She tries to keep her distance. He decides she belongs to him. Now she's caught between a man who devours her with a glance, a child she never planned for, and a betrayal that still bleeds. And Vincent? He’s made one thing terrifyingly clear: He doesn’t share.

Blurb "Sign the papers, Celeste." I wiped the blood from my nose, my hands trembling as I handed my husband the contract I had worked tirelessly to finalize for him. But instead of gratitude, he shoved divorce papers in my face. And beside him, smirking in triumph, was the woman he had replaced me with—the daughter of his boss. Five years of sacrifice, of love, of loyalty… all reduced to nothing. Ethan Carter had used me, discarded me, and now he was climbing higher on the back of another woman. I thought that was the end of my story. Until he appeared. Damien Sinclair—the youngest billionaire in the country, ruthless in business, feared by his enemies, and a man who never gave without taking something in return. And he wanted me. Overnight, I went from the forgotten ex-wife to the envy of high society, the woman draped in luxury, held in the arms of a man who commanded the world. But Damien’s interest in me wasn’t coincidence. He knew my past. He knew my pain. And when he whispered my childhood nickname in his sleep, I realized… he knew me. Now, I must uncover the truth before I lose myself in the passion, the power, and the dangerous game I never saw coming. Because in Damien’s world, love is just another negotiation—and I might be the one paying the ultimate price.

"Stop we can't do this, Levi, it's wrong" I panicked, we were out in the open, and anyone who see us, children of the newlyweds like this would raise an alarm, he towered over me ignoring my protest as he cupped my chin forcing me to look into his alluring green eyes. "You know you want to" His voice was gruff and smoky. He was right. I didn't say anything when he leaned in and claimed my lips, somewhere at the back of my mind I imagined us at the altar just like our parents were earlier. Till death do us part? ~~~~~~ I have always hated how my life was with Mom getting married almost every year, I didn't think this would be any different from the rest. We will be out of here before winter, I would add the Sinclair to the list of families I owe an apology to in the future that's if I don't forget them. Or at least that's what I thought until I met him. Levi Sinclair. He is the one I shouldn't want yet I keep gravitating towards him and the more I tried hating him the more I wanted him. And I wasn't the only one with these feelings. Levi wanted me just as much as I wanted him, even more than I wanted him. But he is my stepbrother and I can't go down that path. Ll// So why can't my body refuse to listen to my brain when I'm alone with him?

She was never meant to want him. He was never meant to need her. But some shadows are too enticing to ignore… For as long as Isla Montgomery can remember, Liam Sinclair has been more than just her father's best friend—he's been a whispered name in the hallways, a powerful presence in their family conversations, and a haunting figure in her daydreams. Charismatic, cold, and irresistibly out of reach, Liam built an empire from the ashes of betrayal. And now, he's back—richer, harder, and more broken than ever. Isla is no longer the wide-eyed girl he once brushed aside. She’s grown, bold, and dangerously drawn to the man who was always forbidden. But when her father's past begins to unravel, Isla finds herself tangled in a web of secrets, lies, and a truth that could shatter everything. As her world crumbles and Liam’s enemies close in, Isla must decide: Is she chasing the man... or the shadow of who he used to be? Because loving Liam Sinclair could be her greatest rebellion—or her final downfall.

Chloe Sinclair thought she had everything figured out until the love of her life, Steven Blackwood, betrayed her. Seeking solace, she finds comfort in a passionate encounter with a handsome friend. When her father’s debts force her into a contract marriage with Steven, Chloe believes it's the only way to save her father. But everything changes when she discovers that her entire life has been built on lies and manipulation. Faced with heartbreak and cruelty, She falls in love with a reclusive billionaire - the very same friend from the unforgettable night, Liam Hawthorne meanwhile chloe can’t ignore the unresolved feelings she still holds for Steven, leaving her torn between love and heartbreak, caught in a dangerous love triangle, Will manipulation and lies tear her apart, or will Chloe finally embrace forgiveness and a second chance at love?

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.

In the glittering world of wealth and power, where every smile was calculated and every gesture choreographed, Ann Sinclair is left wondering ‘what had she truly signed up for? Now that she was married to Lucas Montgomery, the internet giant. The game of marriage had begun, and neither of them knew just how dangerous it would become.

Xander Sinclair, the rebellious heir to the Crescent Moon Pack, has spent his life resisting the weight of his birthright. But his formidable grandmother, Luna Susanne, has other plans. She issues an ultimatum—choose a mate within six months or be stripped of his claim to the pack. Determined to defy her, Xander makes the most scandalous choice possible: Amara Donald, a rogue werewolf his estranged stepbrother, Derek, cast aside years ago. It is the perfect act of rebellion—binding himself to a woman hated by the very pack that seeks to control him. But Amara has her own reasons for accepting. Once the heir to a powerful bloodline, her family was destroyed by the Sinclairs. Now, she has a chance to reclaim what was stolen from her. What begins as a battle of dominance soon turns into something far more dangerous—an uncontrollable bond, ancient rivalries reigniting, and a force threatening to tear the Crescent Moon Pack apart. As the full moon rises and dark truths come to light, Xander and Amara must decide—are they destined for love, or will their union bring war?