The Guardian has a list of top 50 movies made into books.
I’ve only listed the ones I’ve either seen, read or both for my opinion.
The link to the site is at the bottom if you want the whole list.
I’ve put my five favorites in italics. Only those I’ve seen both the movie and read the book.
1984 - Book was better
Alice in Wonderland - Which movie version do they mean?
Catch 22 - Book much better. Movie too confusing.
A Clockwork Orange - I give this five stars. My number three pick
The Day of the Triffids - They’ve got to be kidding. Never read the book though.
Different Seasons (inc The Shawshank Redemption) I give this three stars.
Do Androids Dream of Electric Sheep? (aka Bladerunner) 5 stars. This almost made the top 5
Doctor Zhivago - Never could get through either book or movie.
Fight Club - I didn’t know it was a book. Movie had dumb ending.
Get Shorty - Both pretty good. Liked book better.
The Godfather - Book: 4 stars, Movie 5 stars. My number two pick
Goodfellas - Both about identical. Book was called Wiseguys.
Heart of Darkness (aka Apocalypse Now) Like them both but I don’t think it’s really a valid comparison. Number 5 pick because they aren’t really that much the same.
The Hound of the Baskervilles - Only with Basil Rathbone
Jaws - Both good. Important differences though.
The Jungle Book - Huh? They are both good for different reason.
Lolita - Been a long time but I liked movie better.
Lord of the Flies - 5 stars for both but only the original. This is my number one pick.
One Flew Over the Cuckoo’s Nest - 3 stars each.
The Outsiders - 4 stars each from this reviewer.
The Prime of Miss Jean Brodie - Movie ok. Never read book.
Schindler’s Ark (aka Schindler’s List) - Only saw movie.
The Spy Who Came in From the Cold - Never saw movie. Read book in high school so I don’t really remember if I liked it or not.
The Talented Mr Ripley - Pretty cool movie. Never read book.
To Kill a Mockingbird - I give both 4 stars.
Some others I’d put on my list:
Falling Angel aka Angel Heart. - Creepy stuff.
Killer Angels aka Gettysburg. Though it was about an historical event it was still fiction.
The Satyricon - Come on! Where’s this classic on their list? This is my number four pick. I give the movie a 2 and the book a 4.
Here’s the link: