| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Big Book of Secret Hiding Places | 978-0-915179-66-4 (0-915179-66-0) | 1987 |
| Code Making and Code Breaking | 978-1-55950-034-0 (1-55950-034-4) | 1990 |
| The Big Book Of Secret Hiding Places | 978-1-893626-09-6 (1-893626-09-1) | 1999 |