- Author: Gray Barker, Allen Greenfield, Andrew Colvin, James Moseley
- Language: English
- Year: 2011
- Author: John A. Keel, Gray Barker
- Language: English
- Year: 2014
- Author: John A. Keel, Andrew Colvin, Tessa B. Dick, Gray Barker
- Language: English
- Year: 2013
- Author: John A. Keel Andrew Colvin Gray Barker
- Language: English
- Year: 2014
Book of Adamski
pdf
- Author: Gray Barker
- Language: English
- Year: 196
- Author: Gray Barker
- Language: English
- Year: 1956