The Girl on the Trainis a 2015 psychological thriller novel by British author Paula Hawkins that gives narratives from three different women: Rachel, Megan, and Anna about relationship troubles and binge drinking.
From the first pages, a reader can feel the struggles of the main character who is an alcoholic and obsessed with her ex-husband. There is also some kind of confusion who is who. However, the author made it clear by letting the readers know more about each narrative.