Ambigrammi

The Mind's I (Penguin Press Science)

Gödel, Escher, Bach

Metamagical Themas

I Am a Strange Loop

Fluid concepts & creative analogies

Le Ton beau de Marot

Butterfly in the Quantum World

Mathenauts

The Tumult of Inner Voices or What Is the Meaning of the Word 'I'? (Grace A. Tanner Lecture in Human Values, 1982)

Metafont, Metamathematics, and Metaphysics