Publishing History

This is a chart to show the publishing history of editions of works about this subject. Along the X axis is time, and on the y axis is the count of editions published. Click here to skip the chart.  This graph charts editions published on this subject.
Editions Published
Year of Publication

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Prolific Authors

who have written the most books on this subject
Eric Flint, 4 books
Harry Turtledove, 3 books
Anne Bishop, 2 books
Mercedes Lackey, 2 books
S. M. Stirling, 2 books
Robert Conroy, 2 books
Robert Conroy, 2 books
Ian Tregillis, 2 books
Richard Jefferies, 2 books
Iver P. Cooper, 1 book
Justin Richards, 1 book
Joseph Nassise, 1 book
Walter H. Hunt, 1 book
David Barnett, 1 book
Stephen Baxter, 1 book
Laura Restrepo, 1 book
Ian Stewart, 1 book
Stephen Fry, 1 book
R. J. Pineiro, 1 book
Samuel Butler, 1 book
Jean d' Ormesson, 1 book
Terry Pratchett, 1 book
Dennis Lee, 1 book
Jack Cohen, 1 book
Nalo Hopkinson, 1 book