Harper & Row, 1974. Hardcover with dustjacket, FIRST EDITION. Three essays by the editor ("They Say," The Memory Machine," Arcs & Secants") and these original stories: "Flaming Ducks and Giant Bread" by R. A. Lafferty; "Pale Hands" by Doris Piserchia; "Why Booth Didn't Kill Lincoln" by Edward Wellen; "If Eve Had Failed to Conceive" by Edward Wellen; "Where Late the Sweet Birds Sang" by Kate Wilhelm; "Melting" by Gene Wolfe; "In the Lilliputian Asylum: A Story in Eight Poems & an Interrogation"(poem) by Michael Bishop; "Ernie" by Lowell Kent Smith; "Live? Our Computers Will Do That for Us" by Brian W. Aldiss; "Ace 167" by Eleanor Arnason; "Biting Down Hard on Truth" by George Alec Effinger.
Used availability for Damon Knight's Orbit 15
October 1974 : USA Hardback