This mystery, narrated by three London-area women, is tightly written with multiple who-dunnit style twists and turns. Rachael takes the train into London every day and has gotten into the habit of fantasizing about the lives of two people she’s never met in a house near the tracks several doors down from the house where she used to live. She builds a perfect life for the unknown couple in the house and almost comes to believe she knows them–until the woman who lives there ends up missing.
The interesting plot is dulled to some extent due to the fact that Rachael, Anna and Megan seem some hopelessly inept in maintaining any order and purpose in their lives other than, perhaps, a focus on their relationships with men.
The author brings a nice touch to Rachael’s chapters because her excessive drinking makes her an unreliable narrator. The police–and the readers, as well–won’t be sure until near the end of the book what she saw and what she did during a black-period on the night “it happened.”
The train imagery is pitch perfect and the ending is satisfying.