| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Grand Canyon | 978-0-8027-7569-6 (0-8027-7569-1) | 2000 | Linda Viera |
| Grand Canyon: A Trail Through Time | 978-0-8027-8625-8 (0-8027-8625-1) | 1997 | |
| The Ever-Living Tree: The Life and Times of a Coast Redwood | 978-0-8027-7477-4 (0-8027-7477-6) | 1996 | |