
The Sidewise Awards for Alternate History were established in 1995 to recognize the best alternative history stories and novels of the year.

Stephen Baxter is an English hard science fiction author. He has degrees in mathematics and engineering.

Alain Bergeron is a Québécois science fiction author and political scientist.

Michael Chabon is an American novelist, screenwriter, columnist and short story writer. Born in Washington, DC, Chabon spent a year studying at Carnegie Mellon University before transferring to the University of Pittsburgh, graduating in 1984. He subsequently received a Master of Fine Arts in creative writing from the University of California, Irvine.

Ted Chiang is an American science fiction writer. His work has won four Nebula awards, four Hugo awards, the John W. Campbell Award for Best New Writer, and four Locus awards. His short story "Story of Your Life" was the basis of the film Arrival (2016). He is also artist in residence at the University of Notre Dame.

Lyon Sprague de Camp, better known as L. Sprague de Camp, was an American writer of science fiction, fantasy and non-fiction. In a career spanning 60 years, he wrote over 100 books, including novels and works of non-fiction, including biographies of other fantasy authors. He was a major figure in science fiction in the 1930s and 1940s.

Gardner Raymond Dozois was an American science fiction author and editor. He was the founding editor of The Year's Best Science Fiction anthologies (1984–2018) and was editor of Asimov's Science Fiction magazine (1984–2004), garnering multiple Hugo and Locus Awards for those works almost every year. He also won the Nebula Award for Best Short Story twice. He was inducted to the Science Fiction Hall of Fame on June 25, 2011.

Warren Girard Ellis is a British comic-book writer, novelist, and screenwriter. He is best known as the co-creator of several original comics series, including Transmetropolitan (1997–2002), Global Frequency (2002–2004), and Red (2003–2004), which was adapted into the feature films Red (2010) and Red 2 (2013). Ellis is the author of the novels Crooked Little Vein (2007) and Gun Machine (2013), and the novella Normal (2016).

Eric Flint is an American author, editor, and e-publisher. The majority of his main works are alternate history science fiction, but he also writes humorous fantasy adventures. His works have been listed on the New York Times, Wall Street Journal, Washington Post, and Locus Magazine best seller lists. He is a co-founder and editor of the Baen Free Library.

Stephen John Fry is an English actor, comedian and writer. He and Hugh Laurie are the comic double act Fry and Laurie, who starred in A Bit of Fry & Laurie and Jeeves and Wooster.

Gordon Randall Phillip David Garrett was an American science fiction and fantasy author. He was a contributor to Astounding and other science fiction magazines of the 1950s and 1960s. He instructed Robert Silverberg in the techniques of selling large quantities of action-adventure science fiction, and collaborated with him on two novels about men from Earth disrupting a peaceful agrarian civilization on an alien planet.

Mary Robinette Kowal is an American author and puppeteer.

Ken Liu is a multiple Hugo Award-winning American author of science fiction and fantasy. His epic fantasy series The Dandelion Dynasty, the first work in the "silkpunk" genre, is published by Simon & Schuster. His short stories have appeared in F&SF, Asimov's, Analog, Lightspeed, Clarkesworld, and multiple "Year's Best" anthologies.
Kenneth Macrae MacLeod is a Scottish science fiction writer. He has won Prometheus Award and the BSFA award, nominated for Arthur C. Clarke Award
Paul J. McAuley is a British botanist and science fiction author.

Alastair Preston Reynolds is a British science fiction author. He specialises in hard science fiction and space opera. He spent his early years in Cornwall, moved back to Wales before going to Newcastle University, where he read physics and astronomy. Afterwards, he earned a PhD in astrophysics from the University of St Andrews. In 1991, he moved to Noordwijk in the Netherlands where he met his wife Josette. There, he worked for the European Space Research and Technology Centre until 2004 when he left to pursue writing full-time. He returned to Wales in 2008 and lives near Cardiff.

Chris Roberson is an American science fiction author, trombonist, and publisher based in Portland, Oregon, best known for alternate history novels and short stories.

Mary Rosenblum was an American science fiction and mystery author.

Philip Milton Roth was an American novelist and short-story writer.

Robert Sobel was an American professor of history at Hofstra University and a well-known and prolific writer of business histories.

Charles David George "Charlie" Stross is a British writer of science fiction and fantasy. Stross specialises in hard science fiction and space opera. Between 1994 and 2004, he was also an active writer for the magazine Computer Shopper and was responsible for the monthly Linux column. He stopped writing for the magazine to devote more time to novels. However, he continues to publish freelance articles on the Internet.

Harry Norman Turtledove is an American novelist who is best known for his work in the genres of alternate history, historical fiction, fantasy, science fiction, and mystery fiction.

Walter Jon Williams is an American writer, primarily of science fiction. Previously he wrote nautical adventure fiction under the name Jon Williams, in particular, a series of historical novels set during the age of sail, Privateers and Gentlemen (1981–1984).

Benjamin Allen H. "Ben" Winters is an American author.