Professor Challenger Books in Order

Professor Challenger leads an expedition to a remote South American plateau where prehistoric creatures may still survive. Joined by a skeptical scientist, an adventurer and a young journalist, he seeks proof amid an increasingly dangerous and unfamiliar environment.

Professor Challenger warns that Earth is entering a poisonous region of space and summons his former expedition companions with oxygen supplies. Sheltering together, they watch civilization fall silent and confront the possibility that humanity's ordinary existence is ending.

Reporter Edward Malone and Enid Challenger investigate spiritualism, beginning with a professional assignment that becomes personally important. Their encounters with séances and claimed messages from the dead clash with Professor Challenger's skepticism, placing conviction and scientific doubt in direct conflict.

Convinced that Earth itself is a living creature, Professor Challenger recruits drilling expert Peerless Jones for an extraordinary experiment. A deep excavation aims to pierce the planet's outer layers and announce humanity's existence, raising questions about the consequences of his ambition.

Reporter Malone takes Professor Challenger to investigate Theodore Nemor's claim that a machine can dissolve objects and restore them intact. Demonstrations challenge Challenger's skepticism, but the invention's potential use as a devastating weapon turns scientific curiosity into a more urgent concern.