John Barnes (born 1957 in Angola, Indiana) is an American science fiction author.
Two of his novels,
The Sky So Big and Black and The Duke of Uranium have been reviewed as having content appropriate for a young adult readership, comparing favorably to Robert A. Heinlein's "juvenile" novels. He has contributed to the  Internet Evolution website.
He has done work in systems analysis, business statistics, software reliability theory, sentiment analysis, statistical semiotics, and formal specification.
Barnes's hometown is
Bowling Green, Ohio. Barnes earned a B.A. degree from Washington University, an M.A. degree from the University of Montana, and a Ph.D. degree in theater from the University of Pittsburgh. He has taught at Western State College. He lives in Colorado.  Barnes has been married three times and divorced twice.
Century Next Door series
Thousand Cultures series
The four novels in the
Thousand Cultures series include the theme of the effects of globalization, at an interstellar scale, on isolated societies.
Time Raider series
Timeline Wars series
Jak Jinnaka series
The Last President was originally scheduled for 2012, but was delayed due to disagreements between Barnes and the publisher over the direction the series was taking. The final book in the series was published by Ace in 2014. Barnes is considering re-writing the first two books to make them more consistent with his original conception of the series.
One True, fictional artificial intelligence central to the Century Next Door series.
Review, The Sky So Big and Black and The Duke of Uranium reviews at Locus
"Amazon.com: John Barnes: Books, Biography, Blog, Audiobooks, Kindle". amazon.com.
"Blogger: User Profile: John Barnes". blogger.com.
"Amazon.com Customer Discussions > John Barnes forum Has Daybreak 3 - "The Last President" been cancelled".
"Bibliography: Apocalypses and Apostrophes". Internet Speculative Fiction Database.
 Finity review, x, y, z, t: dimensions of science fiction, Damien Broderick, 2004, p. 152
Barnes, John (2014). Gaudeamus. New York: Tor. ISBN . 9780765311986
John Barnes. "Approachably Reclusive". thatjohnbarnes.blogspot.com.
Tilton, Lois (December 7, 2010). "Lois Tilton reviews Short Fiction, early December". Locus . Retrieved 2015.
Seel, Nigel (April 11, 2011). "Book Review: . ScienceFiction.com Engineering Infinity (ed) Jonathan Strahan" . Retrieved 2015.
Waters, Robert E. (March 8, 2011). ". Engineering Infinity, edited by Jonathan Strahan" Tangent . Retrieved 2015.