2005
Long Form The Summer Isles by Ian R. MacLeod
Short Form "Pericles the Tyrant" by Lois Tilton

2004
Long Form The Plot Against America by Philip Roth
Short Form Ministry of Space by Warren Ellis, Chris Weston, and Laura DuPuy Martin

2003
Long Form Murray Davies. Collaborator  by Davies Murray
Short Form "O One" by Chris Roberson

2002
Long Form - The Severed Wing by Martin J. Gidron and Ruled Britannia by Harry Turtledove (tie)
Short Form - "Empire" by William Sanders

2001
Long Form - The Children's War by J.N. Stroyar
Short Form - "The Human Front" by Ken MacLeod

2000
Long Form - Ash: A Secret History by Mary Gentle
Short Form - "Seventy-Two Letters" by Ted Chiang

1999
Long Form - Resurrection Day by Brendan DuBois
Short Form - "The Eighth Register" by Alain Bergeron
Special Achievement - Randall Garrett, for the Lord Darcy stories

1998
Long Form - Making History by Stephen Fry
Short Form - "The Summer Isles" by Ian R. MacLeod

1997
Long Form - Harry Turtledove. How Few Remain
Short Form - "The Undiscovered" by William Sanders
Special Achievement - For Want of a Nail...; If Burgoyne Had Won at Saratoga by Robert Sobel

1996
Long Form - Voyage by Stephen Baxter
Short Form - "Foreign Devils" by Walter Jon Williams

1995
Long Form - Pasquale's Angel by Paul J. McAuley
Short Form - "Brigantia's Angels" by Stephen Baxter
Special Achievement - L. Sprague de Camp, for seminal works in the field