Heretics of Dune

Fifteen hundred years after the God Emperor Leto II's death scattered humanity across the stars in what's called simply the Scattering, sandworms have reappeared on the planet once known as Dune, now Rakis, and spice is flowing again. Three powers vie for control: the Bene Gesserit sisterhood, the machine-minded Ixians, and the gene-splicing Bene Tleilax, even as a new and violently expansionist force called the Honored Matres arrives from beyond known space. Into this, the Bene Gesserit send an aging Duncan Idaho clone, a warrior named Miles Teg, and a girl named Sheeana who can command the worms themselves. The fifth novel of Frank Herbert's Dune series.