- AudiolivroThe Prince of PerilOtis Adelbert Kline
- AudiolivroThe Swordsman of MarsOtis Adelbert Kline
- AudiolivroMaza of the MoonOtis Adelbert Kline
- AudiolivroThe Outlaws of MarsOtis Adelbert Kline
- AudiolivroThe Port of PerilOtis Adelbert Kline
- AudiolivroPlanet of PerilOtis Adelbert Kline
- AudiolivroThe Secret KingdomOtis Adelbert Kline