I could tell when my son started hiding things from me. He used to walk to school with a mischievous grin on his beautiful face. Now he avoids eye contact and keeps his head down. Since I discovered he’s being bullied by a classmate, I’ve spent every day worrying, my stomach churning with anxiety from the moment he leaves the house to the second he walks back through the door. Everyone keeps telling me I’m overreacting, but I won’t risk my child’s safety. My husband and I try to talk to the other boy’s parents, but it only makes things worse. Then our precious child is hurt. Enough is enough.

I open the creaking oak front door of my beautiful country house to see a stranger on my doorstep. The woman is stunning with glossy red hair and flawless make up. "Can I help you?" I ask. That was my first mistake. Alexis tells me she is a distant relative and shows me a DNA match on her phone. She has no family and would love to get to know us. My husband Hugh invites her in to join our dinner party. As we drink wine, she opens up about her sad childhood. Her amber eyes are mesmerizing, and I can see my husband is being drawn in by her story. Then she asks for our help.

From the moment I met Nathan, a widower with two small children, I knew I would do anything for him. Sam and Sienna were both desperate for a mother and I knew I was perfect for them. I would raise them as my own, love them like my own. I would die for them. So when a missing teenager is found lying on the side of the road, my first through is for my precious kids. Are they home? Are they safe?

When Ellie tells me she has a new boyfriend, I am absolutely thrilled and can’t wait to meet him. She finally seems so happy and in love. But there’s a catch. Ellie has never met him in person. In fact, he doesn’t even live in the same country. Our home is in England, but Daryl is in Los Angeles.

I know Benjamin’s new business is in trouble, that he desperately needs your money. I saw the way Gwyn looked at him at your wedding reception, finding any excuse to be close, to laugh too loudly at his jokes. After all, she always wanted your perfect life. But don’t worry, Madeline. I won’t let it end like this. I can see everything from my place in the shadows between the trees. With their house lit up, they are on display. I’ll bide my time and worm my way into their home, their lives. They will never know the truth about who I am.

Everything my husband and I have always dreamt of has finally come true. Our new home with its open-plan kitchen and marble countertops couldn’t be further from the small, damp flat where we lived only months ago. I’d hoped this would be our fresh start, an escape from my past, but the handwritten note that arrived on our doorstep makes my blood run cold – you don’t deserve this life.

It feels like all the air has been knocked out of me. My best friend is dead, killed at her own daughter’s birthday party. All I want to do is run into my husband’s loving arms. But he’s in handcuffs, covered in her blood. His voice quivers, almost sobbing as officers put him in the police car. ‘You don’t think I did this, do you? I was trying to save her.’ At first, I’m sure he couldn’t have done it. The man I love wouldn’t hurt anyone. But as I try to prove that he didn’t murder Lucy, secrets begin unravelling…

Last night, we celebrated our anniversary. Over candlelight, we talked about the children, our work, and I was so happy, and felt so loved. But the next morning, when I check my phone, there is a message. From a friend. And a string of photos appear of my husband, Will, with another woman: walking along the street holding hands. Going into fancy hotels. Standing at a window, his arms around her, her head on his shoulder…

Ethan gently squeezes my hand as he slides the golden ring onto my finger. But I know we aren’t worthy of happiness. As I look down at my wedding ring, in a blistering flash, I suddenly remember another piece of that pitch-black, rainy night… but I try to focus on Ethan’s gorgeous blue eyes. I know exactly what he’s thinking. We can never tell. All our family, friends and loved ones smile as they watch Ethan and I promise to be together until death us do part. But only we know what that really means…Because we have already killed someone.

My mother is obsessed with every detail of my wedding–controlling my dress, my ring, my happiness. But when the day finally comes, will she really let me go?

When I begin to receive threatening messages, one thing becomes clear: Cassandra wants me out of her son’s life, and she will do anything to get what she wants. Including destroying me. But that’s okay. No matter what she does, I’m confident that Miles and I will be forever. Because I know Cassandra’s darkest secret. The one she’ll do absolutely anything to keep. I have a plan, while she has no idea who she’s dealing with. And by the time my darling mother-in-law realizes, it will be far too late for her to run…

My heart pounds as I take in the headline: ‘Missing girl believed kidnapped’. Underneath is a photo of my beautiful daughter Mia, her gap-toothed grin unmistakable. But Mia is safe beside me, snuggled up on the sofa. Who has taken a photo of her, and put it on the news? And what message are they trying to send me…? I run to the window of our little house–the cosy, homely place my husband Mark and I bought so Mia could have everything I didn’t as a child–and pull the curtains tightly shut, hiding us from sight as terror courses through my body.

I’ve lived on this quiet street for years, in the same house I once shared with my husband and our beloved daughter, Chloe. Now they’re both gone and my home, that used to be filled with laughter, is too quiet, too still. When a little boy I don’t recognize knocks at my door, without a parent in sight, I’m shocked. He trembles with nerves, and I tell him I can help find his mother. But I’m not prepared for what he says next. I’m left frozen, heart pounding in my chest.

Cate grips the note with trembling hands, looking down at the delicate bundle on her doorstep. As she reaches down to the baby, she knows she has finally got everything she’s ever wished for. But is he hers to take? Cate tries not to cry as she closes the door on the nursery room once again. All she has ever wanted is to be a mother. Cursed with a medical condition that means she is unable to have children, her only option is to wait for a call from the adoption center. But that call feels like a lifetime away.

I tell myself that Max couldn’t kill anyone. He’s a family man now, different to who he was before. Even so, I should go to the police right away. But I can’t. Because if I do, I’m scared they’ll start to suspect me. How much do I really know about the girl in room 12? And if the truth comes out, how far will I go to protect my precious family?