Powell
Source: "Powell Bibliography." Author Wars, https://authorwars.com/authors/powell.html".
Titles:
Cover Art
Interior Art
- Unknown. Are You There, Mars?
- Unknown. Basic Fundamental
- Unknown. Castaway
- Unknown. Lost Planet
- Unknown. Relic
- Unknown. Relic (reprint)
- Unknown. Space-ship Ahoy!
- Unknown. Technical Error
- Unknown. Technical Error (reprint)
- Unknown. The Barrier
- Unknown. The Moon Men
- Unknown. The Three Suns
- Unknown. The Worlds of If
- Unknown. Time Trap