Likewise “I, Robot” - bought the rights just to rename an existing script, rename a couple characters, and inject a definitive quote; result is absolutely nothing like the book.
Hmmm.....wonder what other movies fit the category of “based on the back cover of the novel”?
“...what other movies fit the category of ‘based on the back cover of the novel’.”
Asimov’s “Nightfall,” for one.