If you can read this book cover-to-cover, you're an absolute hero. Sometimes I wonder if they inserted a big logical error in the middle just to troll people under the assumption nobody would bother to read it.
I read GEB cover to cover and haven’t stopped thinking about it for years. Not a brag, a nudge that it’s not impenetrable and more people should read it.
I used to wonder how likely it was that the printers made some typesetting errors. Who among us could, say, type a tbousand pages of APL symbols without introducing a bug?
It's also pretty typically a part of History Of Mathematics and Philosophy of Mathematics courses.
More seriously, there is indeed a huge logical error at the heart of the whole enterprise but it was not discovered until much later by Kurt Gödel.
Which leads us to our next impenetrable book, Gödel, Escher, Bach by Douglas Hofstadter.