Buku yang Dikarang by Robert Keller

The Deadly Dozen

True Crime Confidential Volume 1

Beyond Evil

True Crime Confidential Volume 4

Serial Killer Case Files Volume 1

True Crime Confidential Volume 3

Medical Monsters

True Crime Confidential Volume 5

Serial Killer Case Files Volume 3

Blood Brothers Vol.1

True Crime Confidential Volume 2

True Crime Confidential Volume 6

Serial Killer Case Files Volume 2

Serial Killers Unsolved

Serial Killer Case Files Volume 5

Serial Killer Case Files Volume 4