| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Pi Digits: Graph Notebook | Funny Math Humor Fibonacci Pi Day Golden Ratio Quad Ruled 5 Squares Per Inch, Notebooks For Students | 978-1-0798-2826-9 (1-0798-2826-5) | 2019 |
| Pi Digits: Math Notebook | Funny Mathematics Humor Fibonacci Pi Day Golden Ratio Journal Mini Notepad | 978-1-0798-2797-2 (1-0798-2797-8) | 2019 |