I loved this book! August moves to New York to escape her mother's endless investigation of August's uncle and namesake who disappeared in the early 70s. Instead she falls into a whole new investigation as she realizes that the girl on her train isn't from the present time and can't escape the subway. I love the way the relationship between August and Jane unfolds and they work to solve the mystery of how Jane ended up stuck on the Q and how to get her out. 

I fell in love with all the side characters in this book. From August's coworkers to her roommates, this book is full of the most loveable characters.