The Girl on the Train is a gripping psychological thriller that follows Rachel Watson, a woman who becomes entangled in a missing person investigation. Rachel, an alcoholic struggling with her own demons, becomes obsessed with a couple she observes from the train every day. When the woman goes missing, Rachel believes she may have witnessed something crucial to the case. This book is filled with twists and turns, keeping readers guessing until the final pages. The Girl on the Train is a suspenseful and addictive read that will keep you on the edge of your seat.