Agreed, this book is a smash hit and the author is widely hailed as the 'next big thing' among the new breed of women crime writers, but I found the novel to be a pretty average work.
A woman(Ella) accidentally stumbles upon two teenage girls during a train journey only to find out later that one of the girls (Anna Ballard) has gone missing. The book is all about the mystery behind the sudden disappearance of Anna. This 'Gone Girl' meets 'The Girl On The Train' kind of tale is told through the perspectives of it's principal characters -Ella (the witness),Luke (Ella's son),Sarah (the friend), to name a few.The chapters are pretty short and each one ends in a mini cliff- hanger (which was pretty annoying, after a point). The characters are poorly written, their motives and intentions quite patchy to say the least. Also, the reason for the 'guilt-feeling' of Ella and the others is not properly explained.The final twist is just about okay.
On the whole, I am giving a 2.5 out of 5 for this book.