This book provides a wonderful overview of petroglyphs and pictographs in general, with the emphasis on the Northwestern states (Oregon, Washington, Idaho, Western Montana) and British Columbia. There are images on nearly every page including black and white photos and drawing recreations. Many elements of rock art are described and defined. There is a time line illustrating eras from pit and groove to modern, and a brief description of what Native American Indians were doing during that time. There are also some quantitative charts of elements. This is a great book for anyone interested in Native Americans, Archaeology, Rock Art, or a great way to get interested.