When mom and dad were down recently for a visit, I kept talking about The Haunting of Hill House (which I really should blog about because it's the only book I remember reading that made me squeal aloud in fear.) One of the things I really liked about that book was the unreliable narrator. It made the whole experience even creepier - I wasn't sure what was actually happening because the main character was all batsh*t and stuff.
The Girl on the Train is similar in that the main character isn't very reliable about telling her story - mostly because she doesn't remember large swaths of time when she blacks out due to her alcoholism. But she's likable and interesting and from the get-go I wanted to know what really happened to the missing woman that aforementioned "girl on the train" eye-stalked every day on her way to and from an imaginary job.
Another interesting device the author used (besides unreliable narration) was giving three characters a first-person voice and limiting their narration to "morning" and "evening" snapshots of their days. This made me feel like I, too, was on a train and sneaking salacious peeks at their lives like a creepy gawker. Very nice literary style.
Thanks for the great recommendation, mom! If anyone else out there likes a good mystery, check this one out. I'll be curious if you're able to figure out whodunit very far before the end of the book. What a fun ride!