Rudolf Jäckli's book mainly consists of about 200 photocopied rock art pictures recorded in the 1970s in Oman. Maps of the sites are included. The rock art was pecked into the limestone walls of wadis. In order to get enough contrast, the "chalk" technique was used for recording them; the chalk was then washed off. R. Jäckli grouped the photos according to motifs. For more information contact Barbara Jäckli, Friedheimstr.5, CH-8057 Zürich, Switzerland.