Picture Rocks: American Indian Rock Art in the Northeast Woodlands By Edward J. Lenik. Located along rivers, at the edge of lakes, on mountain boulders, in rock shelters, on rock ledges where the continent meets the ocean, and tucked into parks and public places, American Indian rock art offers tantilizing glimpses of the signs and symbols of a Native American culture. Interspersing his own interpretations with comments from scholars and Native American story tellers, Lenik provides a definitive look at an extraordinary art form.