Roswell: The Ultimate Cold Case; Eyewitness Testimony and Evidence of Contact and the Cover-UpDonald R. Schmitt4.1
Ancient Alien Question, 10th Anniversary Edition: An Inquiry Into the Existence, Evidence, and Influence of Ancient VisitorsPhilip Coppens4.5
Shards of Earth: First in an extraordinary trilogy, from the winner of the Arthur C. Clarke AwardAdrian Tchaikovsky4.2
Area 51 - Black Jets: A History of the Aircraft Developed at Groom Lake, America's Secret Aviation BaseBill Yenne4.5
The Last Book On The Left: Stories of Murder and Mayhem from History's Most Notorious Serial KillersMarcus Parks4
It’s a Conspiracy!: The World’s Wildest Conspiracy Theories. What They Don’t Want You To Know. And Why The Truth Is Out There.Tom Cutler3.3