Chapter House Dune

Planet Dune has been destroyed; only pockets of resistance remain with the opposition mainly from the Bene Gesserit co-ordinated from their still undiscovered home world. Chapter House. There is a new Scattering being planned and they still hold one asset which has not fallen into enemy hands: they have sandworms, offspring of one giant worm that was rescued from Dune before the end, and in the specially prepared desert they work to turn it into a wasteland.  Book 6 of series.