A lone biologist develops a life-extending serum. On the way to patent it, he learns that someone has been watching his work very closely.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1962 |
|
Shards of Space | Corgi | Collection | 126 |
| 1962 |
|
Shards of Space | Corgi | Collection | 126 |
| July 1962 |
|
Shards of Space | Bantam Books | Collection | 126 |
| 1966 |
|
Shards of Space | Corgi | Collection | 126 |
| February 1971 |
|
Shards of Space | Bantam Books | Collection | 126 |
| September 1991 |
|
The Collected Short Fiction of Robert Sheckley | Pulphouse Publishing | Omnibus | 3-333 |
| September 1991 | The Collected Short Fiction of Robert Sheckley: Book Three | Pulphouse Publishing | Collection | 333 | |
| July 1992 |
|
The Collected Short Fiction of Robert Sheckley: Book Three | Pulphouse Publishing | Collection | 333 |
| August 2010 |
|
Short Science Fiction Collection 39 | LibriVox | Anthology | |9 |
| December 2010 |
|
Robert Sheckley Resurrected: The Early Works of Robert Sheckley | Resurrected Press | Collection | 209 |
| November 2014 |
|
Shards of Space | Gateway / Orion | Collection |