Can anyone help me with a Agatha Christie Essay?

Ok, im writing an essay for the book Agatha Christie worte(The Mysterious affair at styles). I need examples of foreshadowing, plot synopsis, and imagery from the book. I have to explain the way Sgstha Christie has many ways of creating suspence. If you have any advice on this at all please answer. Im a freshman and in English honors, so i need all the help i can get. Im not trying to complain or anything though. So anyone please help. You have my greatest thanks.!