Guy Murchie (Jr.) (25 January 1907 – 8 July 1997) was a writer about science and philosophy: aviation, astronomy, biology, and the meaning of life. He was, successively, a world traveler; a war correspondent; a photographer, staff artist, and reporter for the Chicago Tribune; a pilot and flight instructor; a teacher; a lecturer; an aerial navigator; a building contractor; and founder and director of a summer camp for children. He was a practising member of the Baháʼí Faith. His books included Men on the Horizon (1932), Song of the Sky (1954), Music of the Spheres (1961), and The Seven Mysteries of Life (1978). The latter three books were chosen for promotion by the Book of the Month Club. He illustrated his books with etchings and woodcuts of his own design.