- AudiolibroThe Enigma SourceCharles Breakfield
- AudiolibroThe Enigma ThreatCharles Breakfield
- AudiolibroThe Enigma DragonCharles V Breakfield
- AudiolibroThe Enigma StolenCharles Breakfield
- AudiolibroThe Enigma BeyondCharles Breakfield
- AudiolibroThe Enigma Gamers – A CATS TaleCharles V Breakfield
- AudiolibroThe Enigma AlwaysCharles Breakfield
- AudiolibroThe Enigma BrokerRoxannie Burkey
- AudiolibroThe Enigma RisingCharles Breakfield