Time Twisters — Martin H. Greenberg

A new anthology by some of the top names in the genre.

Time travel and the dangers of altering the time stream continue to fascinate readers. This book offers 17 new stories of daring adventurers who meddle with time including: a science fiction fan who warded off an alien invasion of Earth through contemporary culture...Joan of Arc's training in future history...and an FBI hunt for a Mafia don who found his way back to the age of knighthood.