Death on the Nile by Agatha Christie

Death on the Nile by Agatha Christie is a mystery set on a luxury cruise along the Nile River.

Beautiful and wealthy Linnet Doyle is on her honeymoon when she’s found murdered on board. Hercule Poirot, who happens to be on the same cruise, investigates.

As he questions the passengers, he discovers that almost everyone had a motive — but in the end, it turns out Linnet’s husband and his former lover planned the murder together.