Herring on the Nile — L.C. Tyler

Ethelred Tressider's career is not, let's face it, what one might call glittering. This is not surprising: Ethelred lost any real interest in writing mystery novels many years ago, and his audience has never been truly excited about reading them. And yet the bills must be paid. In a desperate effort to revive his imagination, Ethelred books a cruise down the Nile -- cradle of civilization, ancient royal rivalries, etc. Well, it worked for Agatha Christie.