The Tragedy of the Korosko

The Tragedy of the Korosko (later retitled A Desert Drama) is a gripping adventure novel that thrusts a group of European tourists into the dangers of the Egyptian desert in the 1890s. A motley party - including an English clergyman, a French academic, two American women, an Irish maiden aunt, and others - are enjoying a leisurely Nile river excursion on the Korosko steamer when they are ambushed and kidnapped by Mahdist rebels (dervishes) from Sudan.
In Doyle's fast-paced narrative, the hostages endure a harrowing march into the desert, suffering heat, thirst, and the ever-present threat of death at the hands of fanatical captors. Around campfires, the Mahdists debate executing their infidel prisoners, providing Doyle an opportunity to explore clashing ideologies of the era - Victorian Christians versus Islamic extremists - with surprising even-handedness and moments of mutual respect.
The captives unite in bravery; notable is the transformation of some characters, like the timid English bachelor who finds courage he didn't know he had. The climax is pure suspense: just as executions loom, an Anglo-Egyptian military patrol launches a fierce rescue attack, resulting in a dramatic battle under the desert sun. Bullets fly, and the fate of each tourist hangs in the balance - not everyone survives unscathed.
Doyle based elements of the story on real incidents of the time (the Mahdist Wars), lending authenticity to the peril. The Tragedy of the Korosko combines travelogue detail with white-knuckle action, ultimately celebrating human resilience and cross-cultural camaraderie forged in adversity. It's a fine example of Doyle's talent for thriller writing beyond Sherlock Holmes, showcasing imperial adventure with both critique and excitement.