The people of future earth go back in time in order to recruit humans to fight against an alien invasion that threatens to extinguish humanity.
Category - Time Travel
Books that include time travel elements
A Door Into Time (An Alex Hawk Time Travel Adventure Book 1) by Shawn Inmon
Alex Hawk steps through a portal and into a savage landscape filled with terrible monsters and unknown dangers.
This is How You Lose the Time War by Amal El-Mohtar and Max Gladstone
Two time agents, Red and Blue, fight across space and time in order to advance their respective factions' ultimate goals. But their relationship makes fighting a war more difficult.
The Genesis Conspiracy by James D. Prescott
A virus is unleashed from an ancient body discovered in the Pyrenees. The virus ravages humanity. A group of scientists is sent back in time to retrieve a vaccine, but other forces with different motives have other...
Recursion by Blake Crouch
Helena Smith must stop the world from using her memory travel machine because each use adds a lifetime of memories for people whose memories are affected. When the changes to reality become significant and reality...
The Girl Who Leapt Through Time (2006) Review
Makoto discovers a device that allows her to jump backwards in time, and she soon discovers that there are consequences to time travel.
The Gone World by Tom Sweterlitsch
Shannon Moss is a Navy investigator who is assigned to investigate a murder. She travels to alternate futures in order to solve crimes, and her case is tied to a missing ship that may be responsible for the end of the...