Forerunner
The main series is made up of "Forerunner" and "Forerunner: The Second Venture" with an the omnibus "The Forerunner Factor" and is only loosely tied to the series "Warlock".
Titles (3)
| # | Title | Author(s) | Year | Type |
|---|---|---|---|---|
| 1 | Forerunner | Andre Norton | 1981 | |
| 2 | Forerunner: The Second Venture | Andre Norton | 1985 | |
| The Forerunner Factor | Andre Norton | 2012 | Omnibus |