What to read next?

I am wrapping up the novel Fahrenheit 451 by Bradbury and I am looking for a new book to read next. I came across the novel  Death Comes to Pemberley by P.D. James. I have not read any of this authors other books nor have I ever heard of her. The reason i was drawn to this novel is because I am a large fan of mystery novels. I love the feeling of suspense, how it makes you not want to put the novel down. This book is in the mystery genre. Based on the short summary on the back of the book I think I will like this book. The summary displays what seems like a normal event gone wrong. This type of plot always interests me.

The cover art is simple. I believe the author wanted to keep it simple to let your mind interpret what the meaning of the cover art is. On the cover there is a wagon with a person wearing a red jacket inside. You can not see the persons face, I think this was intentional so you never quite know who it is. The wagon appears to be moving fast with the blurred color around the edges. This may mean the person in the wagon is escaping the murder scene. Maybe the person in the wagon is the killer. The colors are very dim and not very bright. This could mean the theme in the novel may be a little darker versus bright and happy