Is 'The Brother'S Oath' Part Of A Book Series?

Raised as a slave. Chosen by the Moon Goddess. Mated… to the brother she never knew..... Raisa never knew she was the daughter of Alpha Theo and Luna Rina—an heir to the throne blessed by the powerful Alpha Damian. Stolen on the day of her birth and sold into slavery, she grew up with nothing but chains on her wrists and scars on her soul. Now, years later, fate places her in the Alpha's estate… and in the path of a boy who feels like home and danger all at once. He’s drawn to her. Protective of her. Possessive over her. And when the mate bond strikes—shocking them both—his world is shattered. Because she is his… but also his sister.

A typical teenage romance novel. Where the girl falls in love with the jock. But the only difference in this one is that the girl falls in love with her brother. "Why does what I do matter so much to you?" I asked curiously. He slammed his hand against the car behind me as he caged me in. He looked down at me with a scowl on his face, his tall frame hovering over me. "Because I care about you." He said loudly and his minty breath hit my nostrils causing me to gulp. I've never been this close to him before. Since the first day that he met her, he was attracted to her. But he had to keep his feelings a secret, for the sake of their family. She can't fall in love with him. So he needs to show her the worst parts of himself, because maybe then she'll hate him. BOOKS 1 & 2.

Oceana Daciana, who is arranged to marry the Alpha of her parents' closest friend's son, realises her brother is her mate as soon as she turns eighteen. She was shocked by this discovery after eight years of searching for him, knowing that she had harboured these heated forbidden feelings for her brother since she was a child. Gerard, Oceana's brother, returns home. But he doesn't desire her and pushes her away, knowing the dangers and ramifications of having Oceana as his mate. He must leave. He must locate a replacement for Oceana. Because their union is both prohibited and cursed.

“You're my mate," Kyle whispered, his eyes flashing gold in the dim light. I stumbled backward. "That's impossible. We're about to be family." "I know. But the bond doesn't care about that." He's supposed to be her future stepbrother. In four weeks, their parents are moving in together, and Kyle will be family. Off-limits. Forbidden. The bond between them is instant. It's the kind of love that can't be ignored, can't be denied. When Kyle looks at her, Ella feels it in her bones, this is forever. This is fate. Except fate has never been crueler. How can they be together when being together means destroying their family? When every stolen glance across the dinner table is a secret they have to keep? When loving each other means breaking their parents' hearts? She has two mates. A Triad Bond. So rare, most wolves think it's just a myth. But it's real, and it's hers, and now Ella has an impossible choice to make. Kyle is her first bond, her strongest connection. Losing him could break them both. But loving him means hiding, lying, living in the shadows of their own family. Jason offers her something different. With him, there are no secrets. No forbidden touches. No family dinners where she has to pretend her heart doesn't belong to the boy sitting across from her. Jason can give her everything Kyle can't, a normal life, a real future, a love she doesn't have to hide. But choosing one mate means hurting the other. And the full moon is coming and time is running out. And Ella is about to learn that when you're bonded to two Alphas, love isn't about choosing the right person.

I thought my biggest problem was falling for the wrong man. Turns out, the real mistake was getting trapped between two brothers who would burn the world down just to hurt each other. One became my past. The other became my cage. Now I’m stuck inside a life built on secrets, obsession, and violence—where every choice I make seems to drag me deeper into him instead of farther away. I’ve tried fighting him. I’ve tried hating him. God help me, I’ve even tried resisting the way my heart reacts whenever he looks at me. Nothing works. And the more I learn about him, the more I realize one terrifying truth: People close to him don’t survive for long.

Book One- Unbroken Jaden's relationship with Zaden, his twin brother, went downhill after he was betrayed by him. Having lost his mate to the destructive hands of Zaden, darkness and revenge settles deep in Jaden's heart. However, fate gives him a new chance by giving him a new mate. Alas, she's a twin who is at war with her own twin sister, Zaden's mate. A prophecy emerges, a war arises, destinies are rewritten, hearts collide and a vengeful ghost is involved.