"Professor Yonni" is an exciting science fiction novel by the famous author J. Ā. K. The story of the inventive scientist-experimenter Yonni, who tries to unravel and control the strange phenomena in the world. History is closely intertwined with invented technologies, insidious mysteries and incredible adventures. Readers will immerse themselves in the atmosphere of interesting research and dangerous trials, watching how the main character fearlessly steps across the border between reality and fantasy. "Professor Yonny" is a book that fascinates with its plot and leaves behind thoughts about the greatness of the unknown.