Who would you trust with yours? On Selena Murphy's train home from work, a mysterious woman named Martha strikes up a conversation and shares a confession: she's having an affair with her boss. In turn, Selena shares her own secret: she suspects her husband is sleeping with the nanny.

At Selena's station the two women part, and Selena never expects to see her again. Until she receives a message. I'd love to continue our conversation.

Can we get together? It's Martha, by the way. From the train. But Selena never gave Martha her number.

She brushes the message off - until days later her nanny goes missing, and Selena begins to wonder if it's all connected. Who is Martha, really? And what does she want with Selena? Confessions on the 7:45 will have you gripped from the first page until the last. Perfect for fans of Harriet Tyce's Blood Orange and A.J.