- eBookLooking at the Cat:An Eye on EvolutionMary Jo Nickum
- eBookA Girl Named MaryMary Jo Nickum
- eBookMom's Story, a Child Learns about MSMary Jo Nickum
- eBookThe Making of the Grand CanyonMary Jo Nickum
- eBookSerien: Strong WomenMary Jo Nickum
- eBookOlympic National Park, the Wild SideMary Jo Nickum
- eBookThe California Condor, "The Big Ugly"Mary Jo Nickum
- eBookValencina, The Ivory WomanMary Jo Nickum
- eBookValencina, The Ivory WomanMary Jo Nickum
- eBookThecla, the First Woman EvangelistMary Jo Nickum
- eBookDeserts of the WorldMary Jo Nickum
- eBookEve, the First (Liberated) WomanMary Jo Nickum
- eBookEve, the First (Liberated) WomanMary Jo Nickum