by Rizzoli, $50.00. The Incas were Johnnycome-lately conquerors who inherited the arts, roads, and irrigation system created by their predecessors. Mr. Stierlin begins his history of Andean art with pottery made around 3000 B.C. in what is now Ecuador, and traces the development of styles and techniques from one culture to another until the arrival of the Spaniards. Much of his information has only recently emerged from prehistoric murk, and all of it is splendidly illustrated..