|
2025 | |
| long form | Sargassa, Sophie Burnham |
| short form | “A Brother's Oath”, L. Briar |
|
2024 | |
| long form | Cahokia Jazz, Francis Spufford |
| short form | “Apollo in Retrograde”, Rosemary Claire Smith |
|
2023 | |
| long form | The Peacekeeper, B. L. Blanchard |
| short form | (tie) “Dreams of Electric Mothers”, Wole Talabi |
| short form | (tie) “A Sky and a Heaven”, Eric Choi |
|
2022 | |
| long form | Civilizations, Laurent Binet, translated by Sam Taylor |
| short form | “Gunpowder Treason”, Alan Smale |
|
2021 | |
| long form | The Doors of Eden, Adrian Tchaikovsky |
| short form | “Moonshot”, Matthew Kresal |
|
2020 | |
| long form | The Future of Another Timeline, Annalee Newitz |
| short form | “Christmas Truce”, Harry Turtledove |
|
2019 | |
| long form | The Calculating Stars, Mary Robinette Kowal |
| short form | Codex Valtierra, Oscar (Xiu) Ramirez & Emmanuel Valtierra |
| special achievement | Eric Flint, for his ongoing encouragement of the genre of alternate history through his support of the community and writers developed around his 1632 series |
|
2018 | |
| long form | Once There Was A Way, Bryce Zabel |
| short form | “Zigeuner”, Harry Turtledove |
|
2017 | |
| long form | Underground Airlines, Ben H. Winters |
| short form | (tie) “Treasure Fleet”, Daniel M. Bensen |
| short form | (tie) “What If the Jewish State Had Been Established in East Africa”, Adam Rovner |
|
2016 | |
| long form | The Big Lie, Julie Mayhew |
| short form | “It Doesn't Matter Anymore”, Bill Crider |
|
2015 | |
| long form | The Enemy Within, Kristine Kathryn Rusch |
| short form | “The Long Haul: From the ANNALS OF TRANSPORTATION, The Pacific Monthly, May 2009”, Ken Liu |
|
2014 | |
| long form | (tie) The Windsor Faction, D. J. Taylor |
| long form | (tie) Surrounded by Enemies: What If Kennedy Survived Dallas?, Bryce Zabel |
| short form | “The Weight of the Sunrise”, Vylar Kaftan |
|
2013 | |
| long form | Dominion, C. J. Sansom |
| short form | “Something Real”, Rick Wilber |
|
2012 | |
| long form | Wake Up and Dream, Ian R. MacLeod |
| short form | “Paradise Is a Walled Garden”, Lisa Goldstein |
|
2011 | |
| long form | When Angels Wept, Eric G. Swedin |
| short form | “A Clash of Eagles”, Alan Smale |
|
2010 | |
| long form | 1942, Robert Conroy |
| short form | “The Fixation”, Alastair Reynolds |
|
2009 | |
| long form | The Dragon's Nine Sons, Chris Roberson |
| short form | “Sacrifice”, Mary Rosenblum |
|
2008 | |
| long form | The Yiddish Policemen's Union, Michael Chabon |
| short form | (tie) “Quaestiones Super Caelo et Mundo”, Michael F. Flynn |
| short form | (tie) “Recovering Apollo 8”, Kristine Kathryn Rusch |
|
2007 | |
| long form | The Familty Trade, The Hidden Family, and The Clan Corporate, Charles Stross |
| short form | “Counterfactual”, Gardner Dozois |
|
2006 | |
| long form | The Summer Isles, Ian R. MacLeod |
| short form | “Pericles the Tyrant”, Lois Tilton |
|
2005 | |
| long form | The Plot Against America, Philip Roth |
| short form | Ministry of Space, Warren Ellis, Chris Weston & Laura DuPuy Martin |
|
2004 | |
| long form | Collaborator, Murray Davies |
| short form | “O One”, Chris Roberson |
|
2003 | |
| long form | (tie) The Severed Wing, Martin J. Gidron |
| long form | (tie) Ruled Britannia, Harry Turtledove |
| short form | “Empire”, William Sanders |
|
2002 | |
| long form | The Children's War, J. N. Stroyar |
| short form | The Human Front, Ken MacLeod |
|
2001 | |
| long form | Ash: A Secret History, Mary Gentle |
| short form | “Seventy-Two Letters”, Ted Chiang |
|
2000 | |
| long form | Resurrection Day, Brendan DuBois |
| short form | “The Eighth Register”, Alain Bergeron, translated by Howard Scott |
| special achievement | Randall Garrett, for the “Lord Darcy” (series) |
|
1999 | |
| long form | Making History, Stephen Fry |
| short form | “The Summer Isles”, Ian R. MacLeod |
|
1998 | |
| long form | How Few Remain, Harry Turtledove |
| short form | “The Undiscovered”, William Sanders |
| special achievement | For Want of a Nail...: If Burgoyne Had Won at Saratoga, Robert Sobel |
|
1997 | |
| long form | Voyage, Stephen Baxter |
| short form | “Foreign Devils”, Walter Jon Williams |
|
1996 | |
| long form | Pasquale's Angel, Paul J. McAuley |
| short form | “Brigantia's Angels”, Stephen Baxter |
| special achievement | L. Sprague de Camp |