P.M. ยท P. Middleton
| title | ISBN-13 | year of publication |
|---|---|---|
| Discover! America's Great River Road: St. Paul, Minnesota, to Dubuque, Iowa: The Upper Mississippi River | 978-0-9620823-8-2 | 1996 |
| Discover! America's Great River Road: The Upper Mississippi River Valley, St. Paul, Minnesota, to Dubuque, Iowa: 1 | 978-0-9711602-2-4 | 2008 |
| Discover! America's Great River Road: Volume II: Galena, Illinois to St. Louis, Missouri | 978-0-9620823-9-9 | 1998 |
| Discover! America's Great River Road: Volume III: St. Louis, Missouri, to Memphis, Tennessee | 978-0-9620823-6-8 | 1997 |
| Discover! America's Great River Road: Volume IV: Arkansas, Mississippi and Louisiana | 978-0-9711602-1-7 | 2005 |
| Discover!: America's Great River Road: Wisconsin, Iowa, Minnesota, Illinois | 978-0-9620823-0-6 | 1988 |