More like Invader

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The Door Into SummerNovel
Robert A. Heinleinstandalone novel1957
About revenge, set in north america and near future.
The Accidental Time MachineNovel
Joe Haldemanstandalone novel2007
Set in north america.
The Questor TapesNovel
D. C. Fontanastandalone novel1974
Tense in tone, about artificial intelligence, set in north america.
Robots Rule!Series
series3 books2014
About friendship.
Start with The Junkyard Bot →
The TransformersUniverse
universe65 books1985
Science fiction.
“There is a war older than Earth, and it is fought by machines that are alive.”
from the catalogue
Start with Hardwired →
includes Transformers movie prequels, Transformers Movie Novelizations, Transformers Classified, The Transformers (juvenile), Transformers: Rise of the Beasts
The Apocalypse TrollNovel
David Weberstandalone novel1999
Alien invasion, tense in tone, about aliens and war.