The X Factor
| First published | 1965 |
|---|---|
| Publisher | Harcourt, Brace & World |
| Format | Hardcover |
| Type | Novel |
| Cover art | Richard Powers (artist) |
| Pages | 191 |
| Price | $3.25 |
- On copyright page: "First edition" (as noted by Currey), "Copyright (c) 1965 by Andre Norton" and LCCN.
- Month from The Whole Science Fiction Data Base 7.
- $3.25 price and "Jacket design by R. M. Powers" on front flap of jacket. Artist confirmed as Richard M. Powers in the book THE ART OF RICHARD POWERS by Jane Frank.
| Year | Reviewer | Publication |
|---|---|---|
| 1966 | P. Schuyler Miller | Analog Science Fiction -> Science Fact, March 1966 |
| 1967 | Robert Coulson | Yandro, #174 September 1967 |
| 1968 | P. Schuyler Miller | Analog Science Fiction -> Science Fact, June 1968 |
| Title | Year | Publisher | Format | Type | Catalog ID | Cover Artist | Pages | |
|---|---|---|---|---|---|---|---|---|
| The X Factor |
|
1967 | Ace Books | Paperback | Novel | G-646 | Jack Gaughan | 158 |
| The X Factor |
|
1967 | Gollancz | Hardcover | Novel | Alan Breese | 192 | |
| The X Factor |
|
1970 | Ace Books | Paperback | Novel | 92551 | 158 | |
| The X Factor |
|
1972 | Ace Books | Paperback | Novel | 92551 | 158 | |
| The X Factor |
|
1973 | Ace Books | Paperback | Novel | 92551 | 158 | |
| The X Factor |
|
1974 | Ace Books | Paperback | Novel | 92553 | 158 | |
| The X Factor |
|
1981 | Fawcett Crest | Paperback | Novel | Ken Barr | 191 | |
| The X Factor |
|
1984 | Del Rey / Ballantine | Paperback | Novel | Laurence Schwinger | 191 | |
| The X Factor |
|
1988 | Del Rey / Ballantine | Paperback | Novel | Laurence Schwinger | 191 |