Sorry I don’t really have any more detail. I read this blurb about a book on either reddit or goodreads. Something about humanity discovering interstellar travel or something major like that and aliens sending a message warning humanity to stop, or else. At least that’s what I remember. Any help would be appreciated. Been searching for a couple of hours and have had no luck.
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Sounds a bit like Three Body Problem by Cixin Liu. Though the aliens there take an active role in hindering humanity’s ability to develop technology.
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