More like Elfangor's Secret

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FootfallNovel
Larry Niven & Jerry Pournellestandalone novel1985
Alien invasion and first contact, 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
AnimorphsUniverse
universe66 books1996
Science fantasy, about war and coming of age.
“The Yeerks are grey slugs the length of your thumb.”
from the catalogue
Start with The Invasion →
includes Megamorphs, Alternamorphs, The Animorph Chronicles
The Apocalypse TrollNovel
David Weberstandalone novel1999
Alien invasion, about war.
Our Children's ChildrenNovel
Clifford D. Simakstandalone novel1974
Post-apocalyptic, about survival.
“By means of one-way time tunnels, they fled the ravening beasts with teeth, claws and tentacles, that reproduced like bacteria and were intelligent.”
from the catalogue
The VisitorsNovel
Clifford D. Simakstandalone novel1980
First contact, mysterious 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
InvasionNovel
Robin Cookstandalone novel1997
Alien invasion and thriller & suspense, about genetic engineering, set in north america.