The Girl on a Train by Paula Hawkins

     Rachel follows the same routine every week day.  She boards the train for London and comes home every evening warmed by some form of alcohol.  She mourns the life she lost, the ex-husband who has moved on and created a new life. So what's wrong with slipping into the life of the perfect couple, for a moment as her train pauses daily where Rachel can watch that couple cozily sharing breakfast on their deck. 
     Nothing is really wrong with that until it is wrong, very wrong.  Rachel sees something she wasn't meant to see as she gazes for a moment at her perfect couple.  Suddenly, she is mixed up in a mess she really can't comprehend, and as she trips, stumbles, blunders about in other people's lives and a police investigation, she only manages to makes things very dangerous for herself.
     Frequently I avoid books that come with front loaded expectations because others have raved about how awesome sais book is, but The Girl on the Train intrigued me.  Well written, painful, and even exciting, ultimately this novel failed me because I caught on quickly who the bad "guy" really was.  I'd still recommend the novel for those who love a good thrilling mystery.  Most people I know who read it loved it.