Of course re-reading The Murder of Roger Ackroyd gives you a different view of the novel and how brilliant Agatha Christie was. Not gonna say anything about the plot, why it's so brilliant because if you haven't read it, it would be a crime to spoil it. But I highly recommend that you do read it or read it again. Especially if you write yourself even if it's just for yourself or fun. This is such a great way to see how it can be done.