| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1995 | 978-0-9644427-0-2 | Doug Gelbert | The Great Delaware Sports Book |
| 2004 | 978-0-9644427-5-7 | Doug Gelbert | The Canine Hiker's Bible |
| 2001 | 978-0-9644427-9-5 | '' | The 55 Best Places To Hike With Your Dog In The Philadelphia Region ... and 55 more |