K.k. · Kenneth Kalisch · Kenneth Klaus · Kent Klich
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| More number puzzles | 978-0-13-601104-0 (0-13-601104-7) | 1982 |
| More Number Puzzles | 978-0-13-601112-5 (0-13-601112-8) | 1982 |
| The cunning caliph,: And other number puzzles to test your logic | 978-0-06-463541-7 (0-06-463541-4) | 1981 |