The Girl on the Train is a gripping urban mystery fiction book written by Paula Hawkins. The story revolves around Rachel Watson, a woman who takes the same train every day and becomes obsessed with a seemingly perfect couple she sees from the train window. When the woman from the couple goes missing, Rachel becomes entangled in the mystery and tries to uncover the truth. With its suspenseful plot and complex characters, this book will keep you on the edge of your seat until the very end.