THE GREAT DUNE TRILOGY HBHerbert's evocative, epic tales are set on the desert planet Arrakis, the focus for a complex political and military struggle with galaxy wide repercussions. Arrakis is the source of spice, a mind enhancing drug which makes interstellar travel possible; it is the most valuable substance in the galaxy. When Duke Atreides and his family take up court there, they fall into a trap set by the Duke's bitter rival, Baron Harkonnen. The Duke is poisoned, but