Notes: Abridged by Erich Lasswitz, Translated from the German by Hans H. Rudnick, Afterword by Mark R. Hillegas Epigraph by Wernher von Braun The following note appears before the text: "Two Planets is the first English translation of Auf zwei Planeten by Kurd Lasswitz (Leipzig: Verlag B. Elischer Nachfolger, 1897), abridged by Erich Lasswitz (Donauworth: Cassianeum, 1948). This edition is published by special arrangement with Frau Margarethe Lasswitz. Incidental parts of the present text are taken from the 1969 abridgement of Auf zwei Planeten edited by Burckhardt Kiegeland and Martin Molitor, published by Verlag Heinrich Scheffler (Frankfurt/Main, 1969), and are used by permission of the publisher." 1971 is copyright date, this publication date is presumably from 1978 based on LC#.