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In Harry Turtledove's The Disunited States of America, Justin's having the worst trip ever. He and his mother are Time Traders, traveling undercover to different alternate realities of Earth so they can take valuable resources back to their own timeline. In some of... Read Full Overview

Time travel doesn't work. You can't go backward or forward; you're stuck at "now." What you can do is travel sideways, to the same "now" in another timeline where history turned out differently. So far, only our home timeline has figured out how to do that. We use it to conduct... Read Full Overview