Rachel Watson (Emily Blunt) is a divorcee reeling from the recent split with her husband. Travelling on the train every morning during her commute, she finds herself consumed with a seemingly perfect couple whom she passes on a daily basis. However, when she unwittingly becomes witness to something truly shocking as part of her journey, Rachel is drawn into a mystery that will see her life spiral even further out of control. The Hunts Post has four pairs of tickets (two for Cineworld St Neots and two for Huntingdon) to give away. To be in with a chance of winning a pair of tickets, answer this question. Who wrote the book, The Girl on the Train? Answers to: The Hunts Post, 30 High Street, Huntingdon, PE29 3TB or e-mail: firstname.lastname@example.org. Entries, which must include name and address, should reach us by October 20.