In reading order
Canyon Sacrifice
Scott Graham
A Murder in Zion
Nicole Maggi
Mountain Rampage
Scott Graham
Lost in Yellowstone
Nicole Maggi
Yellowstone Standoff
Scott Graham
Yosemite Fall
Scott Graham
Arches Enemy
Scott Graham
Mesa Verde Victim
Scott Graham
Canyonlands Carnage
Scott Graham
Saguaro Sanction
Scott Graham
Death Valley Duel
Scott Graham
Great Sand Dunes Massacre
Scott Graham