W.C. · Will Craig · Willow Creek · Willow Cross
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Math Puzzlers - Grade 3 | 978-0-7877-0553-4 | 2002 | William Crouch |
| Math Puzzlers - Grade 4 | 978-0-7877-0554-1 | 2002 | " |
| Math Puzzlers - Grade 5 | 978-0-7877-0555-8 | 2002 | " |
| Math Puzzlers - Grade 6 | 978-0-7877-0556-5 | 2002 | " |