Don't know if any movies have ever been true to the original Frankestein, but, I own Scott Brick's Audiobook reading of the original Frankenstein (Not the re-issue from the 1930s, it's different), and it is stellar, I've never seen a Frankenstein movie that comes anywhere close to being faithful to the original book.
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One Day I hope to be the Man my Cat thinks I am
Where are we going? And why are we in this Handbasket?