As American Indian writers frequently remind their readers, storytellers wield formidable power to affect the earth and its inhabitants. This power is the same medicine power that inheres in tribal expression such as chants, prayers, and ceremonial rituals. Leslie Marmon Silko, critics point out, modifies literary genres to create the most effective medicine power. When Silko's Storyteller first appeared in 1981, critics were baffled by this complex...