Professor Challenger

Robin Edizioni

Il mondo perduto-La bolla velenosa. Le avventure del Professor Challenger (Vol. 1)

Independently published

Professor Challenger Complete Collection: The Lost World | The Poison Belt | The Land of Mist | The Disintegration Machine | When the World Screamed | Original Edition Annotated

Professor Challenger at the Cusp of Mortality (Anthology Presents: The Professor Challenger Trilogy Book 3) (English Edition)

EDGE Science Fiction and Fantasy Publishing

Professor Challenger: New Worlds, Lost Places (English Edition)

PROFESSOR CHALLENGER: THE KEW GROWTHS AND OTHER STORIES: A Weird Science collection (English Edition)

PROFESSOR CHALLENGER: THE ISLAND OF TERROR: A Sequel to Conan Doyle's The Lost World (English Edition)

Professor Challenger Series (English Edition)    

Baker Press

The Professor Challenger Chronicles (A Collection of Works) (English Edition)

Professor Challenger: The Serpent of the Loch (English Edition)

Professor Challenger at the Edge of Eternity (Anthology Presents: The Professor Challenger Trilogy Book 1) (English Edition)