 An E-book edition was published by Gollancz's SF Gateway imprint on September 29, 2011 as part of a general release of de Camp's works in electronic form.It has also been translated into Portuguese, Dutch, and Italian.The pieces were originally published between 1949 and 1951 in the magazines "Astounding Science-Fiction", "Startling Stories", "Future Combined with Science Fiction", and "Thrilling Wonder Stories".