The Complete Professor Challenger Series

The Challenger Series includes:
"The Lost World" describes an expedition to a plateau in South America where prehistoric creatures including dinosaurs still survive.
"The Poison Belt" depicts the situation in which the Earth passes through a cloud of poisonous ether.
"The Land of Mist" is a tale of the supernatural, focusing on Edward Malone's at first professional, and later personal interest in Spiritualism.
"When the World Screamed" tells of Challenger's World Echinus theory.
"The Disintegration Machine" concerns the potentially dangerous new invention by a scientist named Theodore Nemor.
Memories and Adventures: An Autobiography of Arthur Conan Doyle.