A detailed and comprehensive examination of factors to be taken into consideration to understand meaning and purpose of rock art (petroglyphs, pictographs, geoglyphs) world wide. Prehistoric visual records inscribed or painted on stones and rocks on all continents from mountain tops to caves. The who, what, how, when, where and why of rock art. The only reference book to address these considerations in detail from a rock art researcher who has spent decades on several continents studying rock art first hand. Micnhimer is a member of the Oregon Archaeological Society and the American Rock Art Research Association.