First published in Dime Detective, May 1949.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1953 |
|
E Pluribus Unicorn | Abelard Press | Collection | 181 |
| 1953 |
|
E Pluribus Unicorn | Nelson, Foster & Scott | Collection | 181 |
| November 1956 |
|
E Pluribus Unicorn | Ballantine Books | Collection | 142 |
| 1960 |
|
E Pluribus Unicorn | Abelard-Schuman | Collection | 181 |
| March 1961 |
|
E Pluribus Unicorn | Panther | Collection | 131 |
| June 1963 |
|
E Pluribus Unicorn | Panther | Collection | 131 |
| June 1965 |
|
E Pluribus Unicorn | Ballantine Books | Collection | 142 |
| June 1965 |
|
E Pluribus Unicorn | Ballantine Books | Collection | 142 |
| 1968 |
|
E Pluribus Unicorn | Panther | Collection | 131 |
| 1969 |
|
E Pluribus Unicorn | Panther | Collection | 131 |
| January 1970 |
|
E Pluribus Unicorn | Ballantine Books | Collection | 142 |
| August 1977 |
|
E Pluribus Unicorn | Pocket Books | Collection | 142 |
| August 1977 |
|
E Pluribus Unicorn | Pocket Books | Collection | 142 |
| November 1979 |
|
E Pluribus Unicorn | Pocket Books | Collection | 142 |
| February 1984 |
|
E Pluribus Unicorn | Timescape / Pocket Books | Collection | 142 |
| November 1998 |
|
The Perfect Host | North Atlantic Books | Collection | 167 |
| September 2000 |
|
The Perfect Host | North Atlantic Books | Collection | 167 |
| April 2013 |
|
The Perfect Host | North Atlantic Books | Collection | |10 |
| July 2013 |
|
The Perfect Host | Gateway / Orion | Collection |