Murder of Roger Ackroyd, The BrE AmE
a famous ↑ detective story by Agatha ↑ Christie . When the book was published in 1926, it caused a lot of ↑ controversy (=serious disagreement) among readers because the ↑ narrator is shown to be the murderer at the end of the story. Some people thought that Christie was cheating by using this type of ↑ plot .