People of the VolcanoWhile it now attracts many tourists, the Colca Valley of Perus southern Andes was largely isolated from the outside world until the 1970s, when a passable road was built linking the valleyand its colonial churches, terraced hillsides, and deep canyonto the city of Arequipa and its airport, eight hours away. Noble David Cook and his co researcher Alexandra Parma Cook have been studying the Colca Valley since 1974, and this detailed ethnohistory