David Eso and Kay Burns’s edition of philosopher Leo Ferrari’s previously unpublished 1973 manuscript brings to light a long forgotten satirical work, which, in an age of fake news, possesses renewed relevance. The editors contextualize The Earth is Flat! for the reader with a scholarly introduction and a humorous “Forewarning.” Author, Leo Ferrari, draws on his extensive knowledge of classical thought and its key figures to present a history of ideas that is sometimes accurate, sometimes speculative. Speculative or alternative aspects of this history support his Flat Earth theme, as do a number of scientific experiments outlined, which the reader is encouraged to try. He traces the conflict between “Globularist” and “Planoterrestrial” beliefs from antiquity to his contemporary moment of the early 1970s, marked by space exploration. Later chapters chart the activities and philosophies of the Flat Earth Society of Canada, including Ferrari’s experience on the lecture circuit and in media platforms. The author’s method is to blur the line between seriousness and humour and to show that intellectual work can also be good fun. He uses the idea of a spinning, spherical planet to symbolically represent the alienating effects of technological modernity.