Touponce, William F. (1988). Frank Herbert. Twayne Publishers imprint, G. K. Hall & Co, Boston, Massachusetts, "Herbert's Reputation", 119. ISBN 0-8057-7514-5 "Locus ran a poll of readers on April 15, 1975, in which Dune 'was voted the all-time best science-fiction novel … It has sold over ten million copies in numerous editions.'"