Hattie travels on the 18.53 train home every night. She sits in the same seat, in the same carriage, and sees the same people. The unwritten rule is you don’t talk to your fellow passengers, but Hattie has been watching them all for months now to distract herself from her own troubles.

Everyone thinks I’m living the perfect life. I have my dream job, a stunning apartment, and glamourous friends – who know nothing about my dark past. So I’m shocked when I run into Anna, who I haven’t seen in eighteen years. Everything about her reminds me of the life I’ve left behind. But as her eyes fill with tears and she tells me she’s lost her job and can’t pay her rent, I reluctantly offer her my spare room.

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…

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?

My hand trembles as I stare at the anonymous text. On this sunny Saturday morning, our twin ten-year-old boys were playing in the park just down our tree-lined street. But only one of them has come home… and it’s all my husband’s fault. I race to Leo’s study and demand answers. As his face turns white, I know: one of his affairs has turned deadly. I always smell the unfamiliar perfume on his shirt. I try to pretend we are a happy family, for the sake of the children… but now, my child is in terrible danger.

My husband is a doctor. He’s smart and charming, and everybody trusts him. Except me. On the surface, it looks like I have it all–the perfect marriage, the perfect husband, the perfect life. But it’s far from the truth. Doctor Drew Devlin is not the respectable figure he makes out to be. The reason we moved to this beautiful, old property with a gorgeous view of the sea was because we needed to put our past behind us. It should’ve been a fresh start for us both.

Melody gazes across the rippling lake to the trees on the shore, waiting for her fiancé Evan to arrive so their family holiday can begin. Here in this cabin in a small Canadian island town, there’s so much space for their son to play. It’s going to be perfect–just like the first time Melody visited as a child. But then, a call from Evan shatters her world.

I can’t trust anything Cain says. Desperate for answers, I agree to meet Charlotte in secret. But it’s Charlotte who is full of questions: about our lives, our relationship. It’s only when she lets slip the name of the road I used to live on, that I realize how much she knows about me, too. Cold fear floods through my body. My husband may not have told the truth, but his lies are nothing compared to mine. If Charlotte knows my darkest secret, my whole life could fall apart. How far will I have to go to keep the truth hidden?

It’s the day I’ve been dreaming about my whole life. As I glide down the flower-strewn aisle overlooking the Greek orange groves, in my pearl-encrusted ivory gown, I finally see my fiancé Nik. We look like the perfect couple, but not all fairy tales have happy endings....

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.

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.

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’ve been on edge the whole time because 15 years ago when we were living in this city my husband Jack did something that ripped our lives apart. I swore I would never come back here, but Jack insisted. One afternoon, in the blur of a crowd, I lose sight of my son. I can’t find him anywhere. Frantic, I call my husband. But what he tells me next shakes me to the core....

When I first walked into Jake and Megan’s immaculate home, I felt totally at ease. Sitting in the crisp white living room, they held hands and talked lovingly about their baby girl, Fern. As the weeks passed, I began to think I’d made a mistake in taking the job. Jake was overly friendly from the start, watching my every move and always offering to drop me home, even though it was out of his way. And Megan seemed to take pleasure in telling me off in front of her husband, blaming me for things I hadn’t done.

When I reach my husband, we kiss against the perfect backdrop of the shimmering turquoise sea. The congregation claps, and I turn to smile at them. Then my smile freezes. I see him. Sitting there among my loved ones. An uninvited guest who knows the truth about me and the terrible thing that happened 10 years ago. The man who won’t ever let me be happy. And as he steps forward, asking for everyone’s attention, my legs buckle. I know he wants to destroy my perfect new life.