More like The UFO Files

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The VisitorsNovel
Clifford D. Simakstandalone novel1980
Tense in tone, about survival, set in north america.
“WorldCat: Intelligent, alien creatures arrive on Earth from outer space, threatening world stability and presaging the destruction of civilization.”
from the catalogue
The Hercules TextNovel
Jack McDevittstandalone novel1986
Reflective in tone, about space exploration, set in north america.
Sinister BarrierNovel
Eric Frank Russellstandalone novel1939
Tense in tone, about surveillance.
“Russell revised and expanded the book for its first US publication by Fantasy Press in 1948.”
from the catalogue
The FrescoNovel
Sheri S. Tepperstandalone novel2000
Challenging in tone, about political intrigue.
“The Fresco was on the shortlist for 2001 James Tiptree, Jr. Award”
from the catalogue
The Themis FilesSeries
series3 books2015
Tense in tone, about robots.
“Sleeping Giants and its sequels are told almost entirely through interview transcripts conducted by an unnamed, evasive interrogator, giving the series a documentary, oral-history feel unusual for first-contact SF.”
from the catalogue
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FootfallNovel
Larry Niven & Jerry Pournellestandalone novel1985
Alien invasion, tense in tone, about survival and war.
“When aliens travel to Earth from Alpha Centauri, differences between alien and human psychology result in an unprovoked invasion, and the resulting resistance results in the aliens' use of a devastating weapon.”
from the catalogue