The Girl on the Train – Paula Hawkins (Psychological Thriller, Mystery) Rachel Watson, a lonely and alcoholic commuter, becomes obsessed with a seemingly perfect couple she watches from the train each day. When the woman, Megan, suddenly disappears, Rachel is drawn into the investigation, but her unreliable memory and fragmented recollections make her both a witness and a suspect. As past and present collide, The Girl on the Train delivers a chilling tale of obsession, gaslighting, and buried secrets, leaving readers questioning every perspective in this fast-paced psychological thriller.