Douglas Hofstadter's book on ambigrams (2025)
simple programming languages
essay by Douglas Hofstadter
edition (en)
1979 book by Douglas Hofstadter
non-fiction work by Douglas Hofstadter
2007 edition
1997 non-fiction work by Douglas Hofstadter
book by Douglas Hofstadter
Edition 2001 (0th edition)
Talk by Douglas R. Hofstadter given on Singularity Summit of 2006