"Nine Against the Unknown" is a vintage book that looks at some of history's most important and celebrated explorers including Marco Polo and Christopher Columbus, describing in detail their various voyages and journeys and how they changed the world. Lewis Grassic Gibbon was the pen name of James Leslie Mitchell (1901 - 1935), a Scottish writer. Other notable works by this author include: "The Thirteenth Disciple" (1931), "The Calends of Cairo" (1931),...