The book provides a comparison and an explanation of the petrography of the entire Alpine arc. Numerous of the simpler motives have already been used by the cave dwellers in the ice age. In the Maritime Alps there have been found motives from the dried out West Sahara. As for what concerns northern Italy, there has been a strong influence of Reater and Celts.
Wolfgang Kauer, born in 1957 studied German and art. He researches rock carving and lives in Salzburg, Austria.