Bella Bathurst’s epic story of Robert Louis Stevenson’s ancestors and the building of the Scottish coastal lighthouses against impossible odds.‘Whenever I smell salt water, I know that I am not far from one of the works of my ancestors,’ wrote Robert Louis Stevenson in 1880. ‘When the lights come out at sundown along the shores of Scotland, I am proud to think they burn more brightly for the genius of my father!’Robert Louis Stevenson was the most famous of the Stevensons, but not by any means...