Chapterhouse: Dune by Frank Herbert
The long-established galactic order is passing. The Honoured Matres, ruthless and all-conquering, have destroyed the planet Dune. In opposition, hard pressed but still fighting back, the Bene Gesserit sisterhood co-ordinate their resistance from their as yet undiscovered home world, Chapter House. Now as a new Scattering is planned, they still have one carefully nurtured asset: the sandworms, offspring of the only giant worm salvaged from Dune. Chapter House is to be the new vital home for the cycle that will turn it into a barren wasteland - Chapter House will be the new Dune.