Heretics of Dune

The planet Arrakis is becoming desert again. Lost ones are returning home from the far reaches of space. The great sandworms are dying, and the children of Dunes children awaken from empire as from a dream, wielding the new power of a heresy called love.

Amazon.com

Fifteen hundred years have passed since the 3,500-year reign of the God Emperor Leto Atreides II ended with his assassination; humanity is firmly on the Golden Path, Leto’s plan to save mankind from destruction. By crushing the aspirations of humans for over three thousand years, Leto caused the Scattering, an explosion of humanity into the rest of the universe upon his death. Now, some of those who went out into the universe are coming back, bent on conquest. Only the Bene Gesserit perceive the Golden Path, and are faced with a choice: keep to their traditional role of hidden manipulators, quietly easing tensions and guiding human progress while struggling for their own survival, or embrace the Golden Path and push humanity onward into a new future where humans are free from the threat of extinction.

Wikipedia.com