Time for some trolling. xD
Definitely doing that for Harry Potter books lol, fuck that author (she who shall not be named).
Best let them come up with the idea, then you publish it the next day, and watch the author’s reaction:
“Someone has already published a book on the same idea? Nooo wayyy!”
[Insert “U Mad Bro” Trollface Meme]
For full chaos, send back a history book and watch people try to change it, for better or for worse.
Calm down Satan, we wanna do a little trolling, not create a butterfly nuke.
Send Wikipedia. Oooooooh that’d do it. And it’s probably about as close to objective as can be hoped, I know it actually isn’t, nothing can be, but it’s overall close.