Acknowledgments
Introduction
The Man with the Strange Head
Amazing Stories, January 1927
The Appendix and the Spectacles
Amazing Stories, December 1928
The Gostak and the Doshes
Amazing Stories, March 1930
Paradise and Iron
Amazing Stories Quarterly, Summer 1930
A Problem in Communication
Astounding Stories, September 1930
On Board the Martian Liner
Amazing Stories, March 1931
Mechanocracy
Amazing Stories, April 1932
The Finger of the Past
Amazing Stories, November 1932
Millions for Defense
Amazing Stories, March 1935
Mars Colonizes
Marvel Tales, Summer 1935
The Oversight
Comet Stories, December 1940
Appendix 1: The Future of Scientifiction
Amazing Stories Quarterly, Summer 1929
Appendix 2: Selected Letters
Source Acknowledgments
Breuer's Science Fiction