Mammoth Book of Alternate Histories

by Ian Whates, James Morrow, Eugene Byrne, Kim Newman, Suzette Hayden Elgin, Harry Harrison, Tom Shippey, Esther M. Friesner, A.A. Attanasio, Pat Cadigan, Fritz Leiber, Rudy Rucker, Marc Laidlaw, Judith Tarr, Ian R. MacLeod, Chris Robertson, Harry Turtledove, George Zebrowski, Pierre Gévart