The book I recently read is "The Girl on the Train" by Paula Hawkins. The plot revolves around a woman named Rachel who takes the same train every day and fantasizes about the lives of a couple she sees from the train window. One day, she witnesses something shocking involving the couple and becomes entangled in a web of lies, deceit, and secrets. As Rachel tries to uncover the truth, she unravels her own troubled past and struggles with alcoholism. The novel keeps the readers on the edge of their seats as the mystery unfolds and culminates in a surprising twist at the end.