ACKNOWLEDGMENTS
These stories were previously published individually as follows, and are reprinted by permission of the author’s estate and his agent, Cosmos Literary Agency.
“Rule of the Brains” was first published in Vision of Tomorrow #11, August 1970. Copyright © 1970 by Carrie Fearn; Copyright © 2012 by Philip Harbottle.
“He Never Slept” was first published in Astounding Stories, June 1934. Copyright © 1934 by John Russell Fearn; Copyright © 2012 by Philip Harbottle.
“Mystery of the Martian Pendulum” (with Raymond A. Palmer) was first published in Amazing Stories, October 1941. Copyright © 1941 by John Russell Fearn and Raymond A. Palmer; Copyright © 2005 by Philip Harbottle
“The Mental Ultimate” was first published in Astounding Stories, February 1938. Copyright © 1938 by John Russell Fearn; Copyright © 2002 by Philip Harbottle.