Details from a selection of pulp magazine and sci-fi novel covers have been chosen to complement the stories throughout this collection, as well as assembled as a collage for the front cover. On the following pages, the full artwork and publication information for these works is presented. All illustration credit was sourced from the The Internet Speculative Fiction Database (www.isfdb.org), with the exception of the credit for Operation Interstallar, which was sourced from Project Gutenberg (www.gutenberg.org).
Cover collage; page 304: Earle K. Bergey, Thrilling Wonder Stories, August 1951.
Cover collage; page 306: Earle K. Bergey, Startling Stories, July 1950.
Cover collage; page 298: Harold V. Brown, Startling Stories, July 1939.
Page 6: James B. Settles, Fantastic Adventures, July 1949.
Page 8: Allen Anderson, Planet Stories, May 1952.
Page 22: Bob Hilbreth, Amazing Stories, December 1946.
Page 76: Earle K. Bergey, Thrilling Wonder Stories, December 1941.
Page 100: Arnold Kohn, Amazing Stories, May 1950.
Page 108: Earle K. Bergey, Captain Future: Man of Tomorrow, March 1944.
Page 142: Malcolm Smith, Operation Interstellar, 1950.
Page 176: Robert Gibson Jones, Fantastic Adventures, November 1952.
Page 194: Lawrence Sterne Stevens, Amazing Stories, May 1952.
Page 216: Arnold Kohn, Amazing Stories, August 1947.
Page 282: Matt Fox, Weird Tales, July 1949.