| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Philosophy on the Internet, 1999-2000 | 978-0-13-022072-1 (0-13-022072-8) | 1999 |
| Religion on the Internet, 1999-2000 | 978-0-13-022060-8 (0-13-022060-4) | 2000 |
| Spanish on the Internet, 1999-2000 | 978-0-13-022069-1 (0-13-022069-8) | 1999 |