The original Jurassic Park story, writ by our old pal of Sherlock Holmes fame but employing his other favorite character, Professor Challenge. A quickly read adventure tale of exploring the Brazilian jungle plateau where pterodactyls and stegosauruses still reign. The reporter Malone offers up himself as witness along with Lord Roxton and Professor Summerlee to verify the absurd tales Challenge returns to London with. Malone is mostly motivated by the rebuff of his marriage proposal to Gladys, who prefers an adventurous man. The party become stranded on the plateau and must fight ape-men, dinosaurs, and befriend Indians in order to return. Challenge smuggles a pterodactyl back to London as incontrovertible proof. Gladys, of course, has gone and gotten herself married to a dumpy clerk in the meantime.