Earth: An Alien Enterprise: The Shocking Truth Behind the Greatest Cover-Up in Human History23 Dec 2014by Timothy Good
- by Irena McCammon Scott
- by David Wilcock
- by Paul A. LaViolette Ph.D.
Selected by Extraterrestrials: My life in the top secret world of UFOs, think-tanks and Nordic secretaries9 Dec 2015by William Mills Tompkins and Nick Redfern