Time Machine (Keith and Donald Monroe)
Titles (3)
| # | Title | Author(s) | Year | Type |
|---|---|---|---|---|
| 7 | Mutiny in the Time Machine | Donald Monroe & Keith Monroe | 1962 | |
| 10 | The Time Machine Gets Stuck | Donald Monroe & Keith Monroe | 1965 | |
| 11 | The Time Machine Hunts a Treasure | Donald Monroe & Keith Monroe | 1967 |