Christie Agatha 
The Murder of Roger Ackroyd 

The book's narrator, Dr James Sheppard, introduces himself and explains these are his memoirs of a murder which happened in his town. In King's Abbot, wealthy widow Mrs Ferrars unexpectedly commits suicide, distressing her fiancé the widower Roger Ackroyd. At dinner that evening in Ackroyd's home of Fernly Park, his guests include his sister-in-law Mrs Cecil Ackroyd and her daughter Flora, big-game hunter Major Blunt, Ackroyd's personal secretary Geoffrey Raymond, and Dr James Sheppard, whom Ackroyd invited earlier that day. During dinner, Flora announces her engagement to Ackroyd's stepson, Ralph Paton.