| title | ISBN-13 | year of publication |
|---|---|---|
| The Book of Questions | 978-0-89480-320-8 | 1987 |
| The Book of Questions: Business, Politics, and Ethics | 978-1-56305-034-3 | 1991 |
| The Book of Questions Page-A-Day Calendar 2016 | 978-0-7611-8489-8 | 2015 |
| The Book of Questions: Revised and Updated | 978-0-7611-7731-9 | 2013 |
| The Kids' Book of Questions | 978-0-7611-8464-5 | 2015 |
| The Kids' Book of Questions | 978-0-89480-631-5 | 1988 |
| The Kids' Book of Questions: Revised for the New Century | 978-0-7611-3595-1 | 2004 |
G D · G. P. · G.S. · G. Stock · Gregory D · Gregory S. · Gregory Stock · Ph.D. · S D · S. P.