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Harper Prism (1993–1999) was launched by John Silbersack, Publishing Director, in 1993 as the first science fiction and fantasy imprint of HarperCollins Publishers in the United States. Prism's early authors included Stephen Baxter, Terry Pratchett, Isaac Asimov, and Clive Barker as well as many media and gaming tie-ins such as Magic: The Gathering and The X-Files.

Harper Prism
Parent companyHarperCollins
Statusdefunct
Founded1993
SuccessorEos
Country of originUnited States
Headquarters locationNew York City
Key peopleJohn Silbersack
Publication typesbooks
Fiction genresscience fiction and fantasy

When HarperCollins acquired Avon Books in 1999, the Harper Prism imprint was absorbed into the Avon Eos line.