I need some recommendations!
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Tough one. 1984 is up there. So is The Handmaids Tale. As the best author, the most consistently brilliant, is Sir Terry Pratchett's Discworld.
radio silence (alice oseman), i will reread it over and over again. it's so well written and really made an impact on me. not an easy read but definitely a worthy one.
The Song of Achillies, The strange case of Dr Jekyll and Mr Hyde, No Longer Human, Heartstopper, and The Wisdom of Psychopaths.