Shards of Earth: First in an extraordinary trilogy, from the winner of the Arthur C. Clarke AwardAdrian Tchaikovsky4.2
Roswell: The Ultimate Cold Case; Eyewitness Testimony and Evidence of Contact and the Cover-UpDonald R. Schmitt4.1
If the Universe Is Teeming with Aliens … Where Is Everybody?: Seventy-Five Solutions to the Fermi Paradox and the Problem of Extraterrestrial LifeStephen Webb4.2
UFOs and the Deep State: A History of the Military and Shadow Government’s War against the Truth; 50 Years of Disinformation, Saboteurs, Intimidation, and Cover-upsKevin D. Randle3.6
The Aztec UFO Incident: The Case, Evidence, and Elaborate Cover-up of One of the Most Perplexing Crashes in HistorySuzanne Ramsey3.8