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