Footprints on Sand: a Literary Sampler is a 1981 collection of writings by science fiction authors L. Sprague de Camp and Catherine Crook de Camp, illustrated by C. H. Burnett, published by Advent. The collection was compiled to celebrate the de Camps' appearance as joint Guests of Honor at the June 12–14, 1981 X-Con science fiction convention in Milwaukee, Wisconsin.The book opens with a series of tributes to the de Camps by Robert A.