Hidden Thunder: Rock Art of the Upper Midwest mystery and a design because of

and a design because of what—because of who—is missing

That's why some images of Indians can be so unexpected and disorienting: What is Geronimo doing sitting in a Cadillac

the electrifying proximity of the world of animals

their ongoing struggles against a centuries-old legacy of colonial disempowerment

We stare at each other because we don't know which tribe

Hidden Thunder: Rock Art of the Upper Midwest mystery and a design because ofIn Hidden Thunder, renowned watercolor artist Geri Schrab and archaeologist Robert "Ernie" Boszhardt give readers an up close and personal look at rock art. With an eye toward preservation, Schrab and Boszhardt take you with them as they research, document, and interpret at the ancient petroglyphs and pictographs made my Native Americans in past millennia. In addition to publicly accessible sites such as Wisconsin's Roche a Cri State Park and