Quark/ was an American anthology book series devoted to avant-garde science fiction and related material, edited by writer and critic Samuel R. Delany and poet and editor Marilyn Hacker; four volumes were published in 1970 and 1971.

Quark/1

thumb|right|Cover from the first edition

The first volume of Quark/ was published in 1970 through the Paperback Library and featured the following:

  • Editorial, by Samuel R. Delany & Marilyn Hacker
  • "The Cliff Climbers", by R. A. Lafferty
  • "The Sound of Muzak", by Gardner R. Dozois
  • "A Trip to the Head", by Ursula K. Le Guin
  • "Let Us Quickly Hasten to the Gate of Ivory", by Thomas M. Disch
  • "Inalienable Rite", by Gregory Benford
  • "Orion", by George Stanley
  • "The View from This Window", by Joanna Russ
  • "Gone Are the Lupo", by H. B. Hickey
  • "Fire Storm", by Christopher Priest
  • "Getting to Know You", by Link
  • "Dogman of Islington", by Hilary Bailey
  • "Shades", by Sandy Boucher
  • Twelve Ancillary Approximations for the Quark/ Cover Called Appomattox, by Russell FitzGerald
  • "Carthing", by A. E. van Vogt
  • "Daughter of Roses", by Helen Adam
  • "Adrift on the Freeway", by Edward Bryant
  • "My Father’s Guest", by Joan Bernott
  • Critical Methods: Speculative Fiction, by Samuel R. Delany
  • "Ramona, Come Softly", by Gordon Eklund
  • Six Drawings, by Stephen Gilden
  • Contributors’ Notes

Quark/2

thumb|right|Cover from the second edition

The second volume of Quark/ was published in 1971 through the Paperback Library and featured the following:

  • Introduction, by Samuel R. Delany & Marilyn Hacker
  • "The Interstate", by John Sladek
  • "A Possible Episode in the Picaresque Adventures of Mr. J.H.B. Monstrosee", by Carol Emshwiller
  • "Trojak", by Marek Obtulowicz
  • "Gold, Black, and Silver", by Fritz Leiber
  • "Mensuration", by James Sallis
  • Six Drawings, by Roger Penney
  • "The Voice of the Sonar in My Vermiform Appendix", by Philip José Farmer
  • "The Way Home", by Joan Bernott
  • "Among the Dead", by Edward Bryant
  • "The Last Supper", by Russell FitzGerald
  • "The Village", by Leland Stoney
  • "Arpad", by Alexei Panshin
  • "Bitching It", by Sonya Dorman
  • Five Drawings, by Nemi Frost
  • "Et in Arcadia Ego", by Thomas M. Disch
  • "Landscape for Insurrection", by Marilyn Hacker
  • "The People of Prashad", by James Keilty
  • "The Inception of the Epoch of Mrs. Bedonebyasyoudid", by John Brunner
  • "The Electric Neon Mermaid", by Laurence Yep

Quark/3

thumb|right|Cover from the third edition

The third volume of Quark/ was published in 1971 through the Paperback Library and featured the following:

  • Continuous Landscape, by Donald Simpson
  • Foreword, by Samuel R. Delany & Marilyn Hacker
  • Continuous Landscape, by Donald Simpson
  • "Encased in Ancient Rind", by R. A. Lafferty
  • "Home Again, Home Again", by Gordon Eklund
  • Continuous Landscape, by Donald Simpson
  • "Dog in a Fisherman’s Net", by Samuel R. Delany
  • Six Drawings, by Robert Lavigne
  • "The Zanzibar Cat", by Joanna Russ
  • "Field", by James Sallis
  • "Vanishing Points", by Sonya Dorman
  • "Where Have You Been, Billy Boy, Billy Boy?", by Kate Wilhelm
  • "Brave Salt", by Richard Hill
  • "Nature Boy", by Josephine Saxton
  • Continuous Landscape, by Donald Simpson
  • "Balls: A Meditation at the Graveside", by Virginia Kidd
  • "Ring of Pain", by M. John Harrison
  • "To the Child Whose Birth Will Change the Way the Universe Works", by George Stanley
  • Continuous Landscape, by Donald Simpson
  • "A Sexual Song", by Tom Veitch
  • "Twenty-Four Letters from Under the Earth", by Hilary Bailey
  • Six More Drawings, by Robert Lavigne
  • "The Coded Sun Game", by Brian Vickers
  • Continuous Landscape, by Donald Simpson
  • Contributors’ Notes

Quark/4

thumb|right|Cover from the fourth edition

The fourth volume of Quark/ was published in 1971 through the Paperback Library and featured the following:

  • On Speculative Fiction, by Samuel R. Delany & Marilyn Hacker
  • "Basileikon: Summe", by Avram Davidson
  • "Voortrekker", by Michael Moorcock
  • "Brass and Gold, or Horse and Zeppelin in Beverly Hills", by Philip José Farmer
  • "The Song of Passing", by Marco Cacchioni
  • "Norman Vs. America", by Charles Platt
  • "The True Reason for the Dreadful Death of Mr. Rex Arundel", by Helen Adam
  • "Acid Soap Opera", by Gail Madonia
  • "Bodies", by Thomas M. Disch
  • "Nightsong", by Marilyn Hacker
  • "Cages", by Vonda N. McIntyre
  • "Man of Letters", by Marek Obtulowicz
  • "The Fourth Profession", by Larry Niven
  • Twelve Drawings, by Olivier Olivier
  • from The Day, by Stan Persky

Footnotes