Which Mystery Crime Books For Young Adults Feature Sibling Sleuth Teams?

After one very personal prank sparks an all-out war, Tara finds herself locked in a battle of egos with the Twin captains of the hockey team. Infamous heartbreakers. Menaces with matching smirks. one-liners, and sabotage so insane it makes the school gossip page explode daily. But when a family arrangement forces the twins to move in, the battlefield shifts from school hallways to bathrooms. From cafeteria showdowns to kitchen tension that’s definitely not just about burnt toast. Enemies were easy. Living under the same roof? Complicated. Especially when both twins aren’t backing down. They started this war. She’s going to end it… unless her heart gets caught in the crossfire.

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.

After the death of her mother, Sienna Vale is taken in by her powerful, secretive stepfather and placed under the “protection” of his three mafia sons. But what begins as guardianship turns into something darker—and far more tempting. As Sienna uncovers secrets about her past, her parentage, and the brutal world she now lives in, she finds herself falling deeper into a web of desire, danger, and forbidden love. The brothers were never meant to want her—but they do. And someone wants her dead. Each act raises the stakes: Act I: Seduction begins. One of the brothers might betray her. Someone wants her gone. Act II: She’s trained to survive—body and mind. Romance deepens. Rival mafias close in. Act III: War explodes. Sienna becomes the queen of their underworld—but must choose between love and legacy.

Moving to Washington from Texas to live with her mother's new family, which includes a stepfather and seven stepbrothers, Katherine braces herself for building walls and embracing isolation. But she doesn’t expect to run into the man she had a one-night stand with just a few days ago in Texas, and he is one of her stepbrothers. Trying to resist his charm, she finds that one look from him sends her heart racing. However, he’s not the only one with that effect on her—each of her seven stepbrothers begins to show interest in her, and she can’t help but feel drawn to all of them. Can she survive in a house with her seven deadly stepbrothers?

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.

Don’t trust anyone, not even yourself….You think you know someone pretty well, until you’re awoken in the middle of the night to the sound of unfamiliar voices and realize your sister’s being swept away by some supernatural creatures who climb in and out of windows and leap from two-story houses like it’s nothing.My parents tried to tell me everything was fine, but when Cadence finally did come back from wherever they’d taken her, I knew there was something unusual about my older sister.Now, her best friend is dead.Her ex-boyfriend is acting bizarre.And I’m afraid I might be next.My name is Cassidy Findley, and I’m pretty sure my sister is a vampire, despite her “co-worker” making every effort to brainwash me into believing otherwise. With the help of my two best friends, we vow to get to the bottom of this before it’s too late, and my sister starts to claim other victims. I love her, but I won’t be turned, nor will I just sit by without doing everything I can to stop her. I can only hope that I’m not too late and that I can trust my own memories.Because I’m pretty sure my sister’s friends are coming for me next.The Chronicles of Cassidy is a retelling of The Clandestine Saga specifically for young adult/teen readers told from the perspective of high schooler Cassidy Findley.