Allan Quatermain leads an expedition into the unexplored African interior to locate a missing man and the fabled treasure of King Solomon. Quatermain, a seasoned big-game hunter, agrees to guide Sir Henry Curtis and Captain John Good across the treacherous Kukuanaland desert. The group faces extreme environmental hazards, hostile indigenous tribes, and the machinations of a powerful witch doctor. The narrative follows a first-person perspective, detailing the physical endurance required to survive in a landscape defined by isolation and ancient mystery.

Readers frequently highlight the novel as a foundational text in the lost-world adventure genre. Discussion often centers on the author's ability to construct a sense of wonder regarding exotic locales while reflecting the cultural attitudes of the late nineteenth century. Critics note that the pacing remains consistent, prioritizing external action and environmental challenges over internal character introspection. The work is often studied for its influence on subsequent adventure literature and its role in shaping the archetype of the rugged explorer.