| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Understanding September 11th: Answering Questions About the Attacks on America | Library Binding | 978-1-4395-2749-8 | 2008 |
| Understanding September 11th: Answering Questions about the Attacks on America | Hardcover | 978-0-670-03582-3 | 2002 |
| Understanding September 11th: Answering Questions about the Attacks on America | Paperback | 978-0-670-03587-8 | 2002 |
| Understanding the Holy Land: Answering questions about the Israeli-Palestinian Conflict | Hardcover | 978-0-670-06032-0 | 2005 |