Heart of Darkness
When I found out that Apocalypse Now was based on a book, I immediately set out to read it. But my God is it a slog. And then I somehow convinced myself that it couldn't be that bad, and maybe I just needed to read it again, a few years later, so I went back to it, and it didn't improve the second time around.
While talking about war movies based on literature...
The Seven Pillars of Wisdom (the autobiography of T.E. Lawrence) is a great read. Its 1962 adaptation by David Lean,
Lawrence of Arabia, is one of the great films ever made and my all-time favorite.
Gone with the Wind the novel is a slog that goes on forever and, oh boy, if you think the film was "problematic" for obvious reasons, one should multiply that by a factor of ten or 20 (or more!) for the novel. The film is still long and has uncomfortable moments, but compared to the book it "fixes" these. Vivian Leigh and Clark Gable's performances are ones for the ages, and the effects, story, and soundtrack all hold up.
Starship Troopers
When I was young and stupid, and didn't understand satire, I thought this was the other way around. But Paul Verhoeven pulled an incredibly slick trick with the source material, which takes itself pretty seriously, to the point of being criticized as military/fascist propaganda, by heavily leaning into it, until it becomes ridiculous. I sort of doubt Heinlein would have appreciated it.
I like both the novel and the film equally. They're hard to compare because Verhoeven doesn't even pretend to honor the source material. Which is fine and great -- the film that eventually emerged, like many of his works, is a fun bit of violent mayhem but also one of the most intelligent satires of all time.
If you read through Heinlein's other works, he had a
very strong appreciation for irony. I think he would have seen it the way we do: "This isn't my book. But that's okay. What's here stands on its own."
Another one like that is
Blade Runner. It is only vaguely reminiscent of the **** novel
Do Androids Dream of Electric Sheep, but it takes its unique setting and essential ideas and tightens it to perfection. There are a lot of novels and short stories by Phillip K. **** that could fall into the same category.
Total Recall is a much better film (and yes, the one with Arnold Schwarzenegger) than
We Can Remember It for You Wholesale.