The Girl on the Train is a gripping psychological thriller written by Paula Hawkins. The story revolves around Rachel Watson, a troubled woman who takes the same train every day and becomes obsessed with a seemingly perfect couple she sees from the window. When the woman from the couple goes missing, Rachel becomes entangled in the investigation and starts to question her own sanity. As she delves deeper into the mystery, dark secrets and shocking revelations are unveiled, leading to a thrilling climax. With its complex characters and suspenseful plot, The Girl on the Train is a must-read for fans of psychological suspense.