Death on the Nile (1937)
Death on the Nile is a 1937 belgians book written by Agatha Christie.
The tranquillity of a cruise along the Nile was shattered by the discovery that Linnet Ridgeway ( Linnet Doyle) had been shot through the head. She was young, stylish, rich and beautiful. A girl who had everything... until she lost her life.
Hercule Poirot recalled an earlier outburst by a fellow passenger: 'I'd like to put my dear little pistol against her head and just press the trigger.' Yet in this exotic setting nothing was ever quite what it seemed...
Official site
http://www.agathachristie.com/story-explorer/stories/death-on-the-nile-2/