These are basic books and online materials which I recommend:
Alien Agenda by Jim Marrs
Penetration By Ingo Swann
Connecting the Dots… Making Sense of the UFO Phenomenon
by Paola Harris
Dark Mission: The Secret History of NASA
by Richard C. Hoagland and Mike Berra
Eyes Only by Clifford Stone
Hidden Truth,Forbidden Knowledge by Steven Greer, MD
Fire in the Sky by Travis Walton
Excerpts from Alien Interview by MacElroy/Spencer
After reading this carefully, and comparing the Domain frequency to several intergalactic dimensions, I have determined that this is NOT authentic, but is channeled from a small group of advanced people in the USA who are hoping to spread their ideas concerning the Earth and the universe to many people.
The manuscript may have been mailed to the editor by them.
One telling item is that the Roswell / Corona crash occupants had six digits as shown in the Roswell Autopsy film, not three as stated in this.
This story is very well researched, and is worth reading just for that perspective. Also, the Domain frequency which I experienced while reading it is a very positive and beneficial consciousness raising lightforce.
ALIEN INTERVIEW: DVD
Area 51: The ALIEN Interview (Full Documentary)