- E-bookThe Deadly DozenRobert Keller
- E-bookTrue Crime Confidential Volume 1Robert Keller
- E-bookBeyond EvilRobert Keller
- E-bookTrue Crime Confidential Volume 4Robert Keller
- E-bookSerial Killer Case Files Volume 1Robert Keller
- E-bookTrue Crime Confidential Volume 3Robert Keller
- E-bookMedical MonstersRobert Keller
- E-bookTrue Crime Confidential Volume 5Robert Keller
- E-bookSerial Killer Case Files Volume 3Robert Keller
- E-bookTrue Crime Confidential Volume 2Robert Keller
- E-bookBlood Brothers Vol.1Robert Keller
- E-bookTrue Crime Confidential Volume 6Robert Keller
- E-bookSerial Killer Case Files Volume 2Robert Keller
- E-bookSerial Killers UnsolvedRobert Keller
- E-bookSerial Killer Case Files Volume 5Robert Keller
- E-bookSerial Killer Case Files Volume 4Robert Keller
- E-bookSerie: True Crime ConfidentialRobert Keller
- E-bookSerie: Serial Killer Case FilesRobert Keller
- E-bookSerie: Serial Killer Case FilesRobert Keller