'The Razor's Edge' is a landmark work by the writer, distinguished by its incredible versatility. It is a gripping adventure novel with several plot lines united by the mystery of Alexander the Great's legendary black crown; it is also a science fiction work filled with factual material, theoretical propositions, and hypotheses; and, most importantly, a razor-sharp philosophical treatise on the spiritual power of man, the triumph of reason, and the search for beauty and love.