I have seen several of these toots:
"Who are 5-7 of your favourite authors? Add them as hashtags so we can find each other, boost this, share your own, etc." #BooksTodon

Here is a challenge for this: Diversify your list.
There are more authors out there than white straight cis old men.

I'll start:

#UrsulaKLeGuin
#NKJemisin
#BeckyChambers
#TThornCoyle
#EdithWharton
#AlexisHall
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#DiversityMatters