And I once again regret picking up a book that everyone was obsessed with... 
 First of all, I don't think it deserves to be called a thriller, since thrillers are...thrilling? Everything The Girl on the Train is not. It's extremely repetitive, to the point when it gets annoying as fuck. I mean, by the end of the book, I was already done with: 
 -Alcoholism 
 -Self-pitying (nothing is more of a turn off than when the protagonist keeps whining and complaining about how much their life sucks. I really wanted to punch Rachel in the face.) 
 -People cheating on each other. That's basically everything the novel is about. 
 -Trains 
 -Unnecessary character perspectives (I don't see the point of Anna's POV. It could have been easily excluded without making any difference) 
 -Crying 
 -People insulting Rachel out of the blue, just so I, the reader, can feel sorry for her. I don't, okay? I just don't. 
 The character building is so damn shitty. Anna is, by far, the most annoying of them all; you can easily notice that her POV exists simply to emphasise how poor Rachel is actually made of marshmallows, opposed to Anna, who is a bitch. Just look at the way Anna talks and thinks, and how she's so superficial and egocentric, and how she despises Rachel and she's not even a little bit sorry for what she's done. That's so fake and unbelievable, and her character's purpose is clearly, as I said before, to prove how awesome Rachel is. 
 No, just no. I tried to be indulgent and give this book 2 stars, but why would I even add one more? The writing is mediocre and crappy, the characters are annoying and dull, the plot make you roll your eyes every five sentences, and the ending is anticlimatic. Why on Earth would it deserve more than one star? 
 So, for possible alcoholic divorcees: don't stalk other couples, it's going to end badly.