K.k. · Keith Allen Kay · Keith K
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| A Little Giant® Book: Optical Illusions | 978-1-4027-4971-1 (1-4027-4971-6) | 2007 | |
| BrainStrains Eye-Popping Puzzles | 978-1-4027-2195-3 (1-4027-2195-1) | 2004 | Frank Coussement · Peter De Schepper |