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