More like Wormhole

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FootfallNovel
Larry Niven & Jerry Pournellestandalone novel1985
Alien invasion and first contact, about war, set in north america.
“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.”
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Our Children's ChildrenNovel
Clifford D. Simakstandalone novel1974
Time travel and post-apocalyptic.
“By means of one-way time tunnels, they fled the ravening beasts with teeth, claws and tentacles, that reproduced like bacteria and were intelligent.”
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The WandererNovel
Fritz Leiberstandalone novel1964
Set in space.
The Black CloudNovel
Fred Hoylestandalone novel1957
Hard science fiction, set in mid 20th century and british isles.
The VisitorsNovel
Clifford D. Simakstandalone novel1980
First contact, mysterious in tone, 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 Apocalypse TrollNovel
David Weberstandalone novel1999
Time travel and alien invasion, about war.