| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1964 |
|
Key Out of Time | Ace Books | Novel | |
| 1967 |
|
Key Out of Time | Ace Books | Novel | |
| 1969 |
|
Key Out of Time | Ace Books | Novel | |
| February 2011 |
|
Key Out of Time | Resurrected Press | Novel | |
| March 2013 |
|
Key Out of Time | Spastic Cat Press | Novel | |
| February 2019 |
|
Key Out of Time | Reading Essentials | Novel |