Penrose, a cat with a knack for math, takes children on an adventurous tour of mathematical concepts from fractals to infinity.
- ISBN10 1417627085
- ISBN13 9781417627080
- Publish Date 24 October 1997 (first published 1 January 1997)
- Publish Status Out of Print
- Out of Print 7 April 2021
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Pages 114
- Language English