"Világ ura" by Jules Verne is a novel written in the early 20th century. The book embarks on an adventure set against the backdrop of the Great Eyry, a mountain in North Carolina, where strange phenomena and rumors of volcanic activity begin to disturb the local population. The protagonist, John Strock, a sharp-witted detective from Washington, is enlisted to investigate these disturbances, promising a compelling mix of mystery and scientific discovery. Atthe start of the story, the geographical setting of the Great Eyry is introduced alongside details about the mountain range's history and recent unsettling occurrences, such as steam and flames emerging from it. As Strock prepares for his investigation, he meets with local authorities, all of whom express curiosity and concern regarding the potential dangers posed by the mountain. The narrative builds suspense as it intertwines elements of natural mystery with human trepidation about the unknown, setting the stage for an expedition that seeks to uncover the secrets of the Great Eyry and alleviate the fears of the surrounding communities. (This is an automatically generated summary.)