Poirot Mysteries Book Cover Designs. This design project came about as I have several Agatha Christie novels at home and have always found the covers lacking. The books have never really been modernised or pushed at a younger market, I wanted to create a cohesive set of books with a consistent style. On a shelf, the books look like a collection. The covers are bright and attract you to find out more, you don’t think it’s going to be an Agatha Christie novel because they’ve never been seen like this.  I think is a great idea and hope you like the designs.