Change the past…and the future may come undone.

An outstanding collection of time-traveling alternate history stories from 16 major science fiction writers, both old and new. Every day, a thousand possible futures die unborn around us—corners not turned, paths not taken. But if one could go back into the past and change it, the outcome could be unimaginable.

“Aristotle and the Gun” by L. Sprague de Camp
“Sitka” by William Sanders
“The Only Game in Town” by Poul Anderson
“Playing the Game” by Gardner Dozois and Jack Dann
“Killing the Morrow” by Robert Reed
“The We Frustrate Charlemagne” b R. A. Lafferty
“The Game of Blood and Dust” by Roger Zelazny
“Calling Your Name” by Howard Waldrop
“What Rough Beast?” by Damon Knight
“O Brave Old World!” by Avram Davidson
“Radiant Doors” by Michael Swanwick
“The Hotel at Harlan’s Landing” by Kage Baker
“Mozart in Mirorshades” by Bruce Sterling and Lewis Shiner
“Under Siege” by George R. R. Martin