It's a collection of columns that Hofstadter wrote for Scientific American. It explores a lot of topics, but personally the one I found most interesting was "su

It's a collection of columns that Hofstadter wrote for Scientific American. It explores a lot of topics, but personally the one I found most interesting was "superrationality:" https://en.wikipedia.org/wiki/Superrationality https://en.wikipedia.org/wiki/Superrationality