
Purgatory Pie Press in New York City has published a number of books of my work:
- Box of Growth is a five-book series based on Fibonacci growth sequences.
- Infinity Remove, based on Cantor set and self-similarity.
- The Happersett Accordion, a Moebius invention, and
- Fibonacci Flower, a Fibonacci flower grows before your eyes

| Ivars Peterson wrote an article in Science News Online on the "Happersett Accordion". |