Often cited in Virtual Realty articles as one of the first uses in SF of virtual reality.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1967 |
|
Contraband from Otherspace / Reality Forbidden | Ace Books | Omnibus | 5 |
| 1968 |
|
Reality Forbidden | Robert Hale | Novel | |
| September 2011 |
|
Reality Forbidden | Gateway / Orion | Novel |