A. S. · Alexander Soper · Alexander Spare · Alyson Schafer
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Colorado Mathematical Olympiad: The First Twenty Years and Further Explorations | 978-0-387-75471-0 (0-387-75471-7) | 2010 |
| The Mathematical Coloring Book: Mathematics of Coloring and the Colorful Life of its Creators | 978-0-387-74640-1 (0-387-74640-4) | 2008 |