| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2002 | 978-0-9714226-0-5 | Kristy McGowan · Karen Richards | Puzzler's Guide to the Grand Canyon |
| 2003 | 978-0-9714226-1-2 | Kristy McGowan · Karen Richards | Puzzler's Guide to Yellowstone & Grand Teton |
| 2005 | 978-0-9714226-2-9 | '' | Puzzler's Guide to the Great Smoky Mountains |