Carmen never meant to step into a world of fights, power, and shadowed loyalties.She was just the quiet girl with headphones and books, the shy type , someone who had learned to survive life by staying small, unseen, and untouchable. Until the night her brother Jaxon dragged Rex Mercer into their house, the billionaire fighter with iron fists, sharp eyes, and a promise in his stare that she would never be invisible again.Rex lives in a world where love is dangerous. Rivals circle like wolves, betrayal waits at every corner, and every strike in the underground cage could be his last. But the moment he claims Carmen, the rules changed. He can fight his enemies in the ring, but how does a man like him protect the woman who’s become his heart? Especially when the only way to keep her safe is to bring her directly into his word.What starts as sparks between opposites soon ignites into wildfire. Carmen learns that strength isn’t just found in fists and plans, it’s found in daring to love openly, even when the world calls it foolish. Rex discovers that devotion is not in how much he shields her, but in trusting her to stand beside him. Together, they face ambushes, betrayals, and a rival empire bent on tearing them apart.But when the war threatens not just Rex’s empire but the fragile life they are building, full of soup, broken couches, terrible jokes, and vows whispered against the city’s chaos, they’ll have to decide: is their love worth the fight that could cost them everything?CLAIMED BY THE BILLIONAIRE FIGHTER is a heart-stopping contemporary romance where passion collides with danger, where a soft girl finds her fire, and where a powerful man learns that love is the fiercest weapon of all.If you crave forbidden love, opposites attracting, dangerous devotion, and a hero who would tear the world apart for the woman he loves, this book will keep you breathless until the very last page.