- AudiolivroThe Lion Men of MongoAlex Raymond
- AudiolivroCitadels Under AttackAlex Raymond
- AudiolivroThe Plague of SoundAlex Raymond
- AudiolivroThe Witch Queen of MongoAlex Raymond
- AudiolivroThe Time Trap of Ming XIIIAlex Raymond
- AudiolivroForces from the FederationAlex Raymond
- AudiolivroThe War of the CybernautsAlex Raymond
- AudiolivroCitadels on EarthAlex Raymond
- AudiolivroCrisis on Citadel IIAlex Raymond
- AudiolivroMassacre in the 22nd CenturyAlex Raymond
- AudiolivroWar of the CitadelsAlex Raymond
- AudiolivroThe Space CircusAlex Raymond
- AudiolivroSéries: Flash GordonAlex Raymond