"The Girl on the Train" is a psychological thriller written by Paula Hawkins. The novel, published in 2015, quickly gained popularity and became a bestseller, captivating readers with its gripping narrative and complex characters. The story is a chilling exploration of obsession, deception, and the consequences of fractured relationships. The narrative unfolds through the perspectives of three women: Rachel, Megan, and Anna. Rachel Watson, the central character, is a troubled woman grappling with the aftermath of her failed marriage to Tom. Her daily routine involves commuting on a train, during which she observes the lives of others from the window.