- eBookA Colorado History, 10th EditionMaxine Benson
- eBookMesa Verde National ParkDuane A. Smith
- eBookThe Trail of Gold and SilverDuane A. Smith
- eBookPioneers & PoliticiansRichard D. Lamm
- eBookColoradoThomas J. Noel
- eBookThe Once and Future Silver Queen of the RockiesChristine Bradley
- eBookSerien: Mining the American WestMichael A. Amundson