The Master

Set on and inside Rockall, a small island more than 200 miles northwest of Ireland that Britain claimed in September 1955 (and later annexed) --purportedly in response to the world-threatening events featured in this adventure story, which occurred there that summer --on and inside the rock. Twelve-year-old twins and their pet dog discover a plot to dominate the world, led by a 157-year-old genius physicist and telepath (mad scientist).