If you answered

A book about calculus.

You're wrong, sorry.


In Bill's print, "George Crossed Boundaries", The Handmade Dog with Calculus is combined with a diagram from a calculus textbook and the arborescence pattern. 

However, it's understandable if you fell for this question, because there is a connection between Bill's idea of a locus of beauty and calculus.

For example, in his series of intaglios in the late 1990s, he used a diagram from a calculus textbook as the basis of a series of graceful lines. He engraved the lines into one of the three plates for the Handmade Dog & Calculus series.

The reproduction at the left is an example.

Nice try!

- GM