Dune - Frank Herbert

The Duke of Atreides has been manoeuvred by his arch-enemy, Baron Harkonnen, into administering the desert planet of Dune. Although it is almost completely without water, Dune is a planet of fabulous wealth, for it is the only source of a drug prized throughout the Galactic Empire. The Duke and his son, Paul, are expecting treachery, and it duly comes - but from a shockingly unexpected place.
Then Paul succeeds his father, and he becomes a catalyst for the native people of Dune, whose knowledge of the ecology of the planet gives them vast power. They have been waiting for a leader like Paul Atreides, a leader who can harness that force . . .

DUNE: one of the most brilliantr science fiction novels ever written, as engrossing and heart-rending today as it was when it was first published half a century ago.