Acknowledgment is made for permission to reprint the following material:
"Aristotle and the Gun:" by L. Sprague de Camp. Copyright 1956 by Street & Smith Publications, Inc. Originally appeared in Astounding Science Fiction, February 1956. Reprinted by permission of the author's Estate.
"Sitka," by William Sanders. Copyright © 2004 by Dell Magazines. First published in Asimov's Science Fiction, April/May 2004. Reprinted by permission of the author.
"The Only Game in Town:' by Poul Anderson. Copyright 1960 by Mercury Press, Inc. First published in The Magazine of Fantasy & Science Fiction, January 1960. Reprinted by permission of the author's Estate.
"Playing the Game," by Jack Dann and Gardner Dozois. Copyright © 1981 by TZ Publications, Inc. First published in The Twilight Zone Magazine, February 1982. Reprinted by permission of the authors.
"Killing the Morrow," by Robert Reed. Copyright © 1996 by Robert Reed. First published in Starlight I (Tor), edited by Patrick Nielsen Hayden. Reprinted by permission of the author.
"Thus We Frustrate Charlemagne," by R. A. Lafferty. Copyright © 1967 by Galaxy Publishing Corp. First published in Galaxy, February 1969. Reprinted by permission of the author's Estate.
"The Game of Blood and Dust," by Roger Zelazny. Copyright 0 1975 by UPD Publishing Corporation. First published in Galaxy, April 1975. Reprinted by permission of the author's Estate.
"Calling Your Name," by Howard Waldrop. Copyright 0 2003 by Howard Waldrop. First published in Stars: Original Stories Based on the Songs of Janis Ian (DAW), edited by Janis Ian and Mike Resnick. Reprinted by permission of the author. "Calling Your Name:' words and music by Janis Ian, copyright © Tao Songs Two. All rights reserved. Used by permission.
"What Rough Beast," by Damon Knight. Copyright ©1958 by Mercury Press, Inc. First published in The Magazine of Fantasy & Science Fiction, February 1959. Reprinted by permission of the author's Estate.
"O Brave Old World!," by Avram Davidson. Copyright © 1975 by Avram Davidson. First published in Beyond Time (Pocket Books), edited by Sandra Ley. Reprinted by permission of the author's Estate.
"Radiant Doors," by Michael Swanwick. Copyright © 1998 by Dell Magazines. First published in Asimov's Science Fiction, September 1998. Reprinted by permission of the author.
"The Hotel at Harlan's Landing:' by Kage Baker. Copyright © 2002 by Kage Baker. First published in Black Projects, White Knights (Golden Gryphon). Reprinted by permission of the author and the author's agent, Linn Prentis.
"Mozart in Mirrorshades," by Bruce Sterling and Lewis Shiner. Copyright © 1985 by Bruce Sterling and Lewis Shiner. First published in Omni, September 1985. Reprinted in Mirrorshades (Arbor House), edited by Bruce Sterling. Reprinted by permission of the authors.
"Under Siege," by George R. R. Martin. Copyright ©1985 by George R. R. Martin. First published in Omni, October 1985. Reprinted by permission of the author.