Add Gödel, Escher, Bach: an Eternal Golden Braid to the list

[Nek]

[aztek]

It feels like it belongs here for sure. But technically it's not an example of self-reference itself, rather it talks about it. Unless there is a mention of the book in the book somewhere?

[Nek]

Quoting wikipedia: "The book contains many instances of recursion and self-reference, where objects and ideas speak about or refer back to themselves." Not sure if it qualifies it though. I could misunderstand the purpose of the list.