Stranger in a Strange Land (Heinlein)
Rita Hayworth and Shawshank Redemption (one story in the book "Different Seasons" by Stephen King)
Of Mice and Men (Steinbeck)
The Martian Chronicles (Bradbury)
Roadside Picnic (Strugatsky)
Frankenstein (Shelley)
Brave New World (Huxley)
Farenheit 451 (Heinlein)
Never Cry Wolf (Mowatt)
A Whale for the Killing (Mowatt)
The Machine Stops (Forster)
Heart of Darkness (Conrad)
Starship Troopers (Heinlein)
The Jungle Book (Kipling)
Lost in the Barrens (Mowatt)
The Republic (Plato)
Rendezvous with Rama (Clarke)
Ringworld (Niven)
The Stainless Steel Rat (Harrison)
The Hobbit (Tolkien)
Strange Case of Dr Jekyll and Mr Hyde (Stevenson)
The Odyssey (Homer)
The Man who Would be King (Kipling)
The Pearl (Steinbeck)
Thus Spake Zarathustra (Nietzsche)
Do Androids Dream of Electric Sheep? (Dick)
A Scanner Darkly (Dick)
The Hitchhiker's Guide to the Galaxy (Adams)
Dracula (Stoker)
To Kill a Mockingbird (Lee)
The Count of Monte Cristo (Dumas)
Romeo and Juliet (Shakespeare)
The Wind in the Willows (Grahame)
A Christmas Carol (Dickens)
Alice's Adventures in Wonderland & Through the Looking-Glass (Carroll)
Watership Down (Adams)
Gulliver's Travels (Swift)
Animal Farm (Orwell)
I hope you are encouraged by all the great reasons listed in the rest of the comments. I for one live to read!
My favourite wrt his treatment of gender is I Will Fear No Evil. Was he sci fi writer or writer of social commentary? He was a legit sci fiction writer and one of my favourites is All You Zombies where he deals with the paradox of time travel and ideas like when you are your own grandparent was definitely different. His juvenile series (Have Space Suit, Will Travel) were all benign enough for young kids without any ‘corrupting’ thought seeds and upsetting parents. His stories about parallel worlds and lives could be said to border on metaphysical. His all encompassing free love themes might have been scandalous and pornographic at his time altho it might merely invite eye rolling or nervous dry laughter now.(I don’t know..I can only imagine how it was in those times)
You are right about his contradictions but he had lived long enough to see waves of changes in society. (I might be wrong about the timeline of his various works pre and post 1950s) He was a military man and likely was always a libertarian. And likely an atheist. He was also from an entirely different era. But this theme was always to question authority and not accept what’s handed to you..and always strive for freedom as a personal goal. As a girl, that was important to me and to be able to place freedom over everything else.
Robert A. Heinlein, Have Space Suit—Will Travel (1958)
IIRC, one of Heinlein's juvenile novels referred to this as a skew-flip maneuver; I was quite impressed reading about it at about age 12, several years after its publication date.
[Just remembered the title: Have Space Suit - Will Travel, a play on the title of the TV show Have Gun - Will Travel]
https://en.wikipedia.org/wiki/Have_Space_Suit%E2%80%94Will_T...
