Dune

The year before Dune...

In 10,191 A.G., Padishah Emperor Shaddam IV granted Leto Atreides, the Duke of Caladan, control of the desert planet Arrakis-the most valuable holding in the Imperium.

It was a trap.

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Even in the time leading up to that historic change, danger stalks House Atreides. 

On his ancestral world Caladan, Duke Leto vows to protect his people, his beloved concubine Jessica, and his son Paul. The web of treachery includes the Bene Gesserit Sisterhood, the evil Baron Harkonnen, and even Emperor Shaddam himself. 

While Leto tries to raise Paul to be a worthy leader, a deadly new drug from the deep forests of Caladan spreads and kills ... a dark stain on Atreides honor.

At the same time, a revolutionary movement seeks to destroy the Corrino empire that has stood for ten thousand years. With increasing desperation, this rebellion turns to acts of unspeakable violence. And one rebel leader will stop at nothing to recruit Leto to their cause.

Can Duke Leto survive with his legendary honor-and his family-intact? 

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The Duke of Caladan tells the intertwined stories of some of the most revered characters in science fiction, setting the stage for their legendary saga.

In Frank Herbert's Dune.