Mathematical Illustrations: A manual of geometry and postscript
I remember being delighted when I learned that .ps "images" were actually programs.<p>At some point I wanted to make a book of PostScript code on left pages / graphical output on right pages, but I only made four pages:<p><a href="https://github.com/hrldcpr/geno-pheno#geno--pheno" rel="nofollow">https://github.com/hrldcpr/geno-pheno#geno--pheno</a>