- Carte audioThe Prince of PerilOtis Adelbert Kline
- Carte audioThe Swordsman of MarsOtis Adelbert Kline
- Carte audioMaza of the MoonOtis Adelbert Kline
- Carte audioPlanet of PerilOtis Adelbert Kline
- Carte audioThe Port of PerilOtis Adelbert Kline
- Carte audioThe Outlaws of MarsOtis Adelbert Kline
- Carte audioThe Secret KingdomOtis Adelbert Kline