| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2005 | 978-0-9769218-0-6 | Grant Collier · Joseph Collier | Colorado, Yesterday & Today |
| 2006 | 978-0-9769218-2-0 | Grant Collier | Colorado's Hidden Wonders |
| 2008 | 978-0-9769218-6-8 | '' | Colorado 2009 Scenic Calendar |
| 2009 | 978-0-9769218-7-5 | '' | Colorado 2010 Scenic Wall Calendar |