- AudiolibroThe Swordsman of MarsOtis Adelbert Kline
- AudiolibroThe Prince of PerilOtis Adelbert Kline
- AudiolibroMaza of the MoonOtis Adelbert Kline
- AudiolibroPlanet of PerilOtis Adelbert Kline
- AudiolibroThe Port of PerilOtis Adelbert Kline
- AudiolibroThe Outlaws of MarsOtis Adelbert Kline
- AudiolibroThe Secret KingdomOtis Adelbert Kline