The Girl on the Train by Paula Hawkins
 
Original review from 2015: I don't remember what  compelled me to pull this audiobook off of the shelf at the local  library. Was it a stray recommendation? Something about the title? No  matter how I try to remember, all I can come up with is a blank space.  It's frustrating, yet oddly appropriate for this book's forgetful  protagonist. Rachel has been depressed ever since the breakdown  of her marriage to Tom and one of her coping mechanisms is to obsess  over the couple she watches from the train each day during her commute.  They look so perfect and happy - like she once was - and she invents an  entire life for these two. Then, one day, she sees something alarming in  their backyard and Rachel decides to stop just being the girl on the  train and insert herself into their lives. The next morning, Rachel  wakes up in agony and no memory of the night before. Things get even  worse when she learns that the woman from the couple (Meghan) has gone  missing. The mystery is t...
