If you are a fan of the Dune sequels, you can download Kevin J. Anderson and Brian Herbert's Paul of Dune for only 2.99$ here.
Here's the blurb:
Frank Herbert's Dune ended with Paul Muad’Dib in control of the planet Dune. Herbert’s next Dune book, Dune Messiah, picked up the story several years later after Paul’s armies had conquered the galaxy. But what happened between Dune and Dune Messiah? How did Paul create his empire and become the Messiah? Following in the footsteps of Frank Herbert, New York Times bestselling authors Brian Herbert and Kevin J. Anderson are answering these questions in Paul of Dune. The Muad’Dib’s jihad is in full swing. His warrior legions march from victory to victory. But beneath the joy of victory there are dangerous undercurrents. Paul, like nearly every great conqueror, has enemies--those who would betray him to steal the awesome power he commands. . . And Paul himself begins to have doubts: Is the jihad getting out of his control? Has he created anarchy? Has he been betrayed by those he loves and trusts the most? And most of all, he wonders: Am I going mad? Paul of Dune is a novel everyone will want to read and no one will be able to forget.
You can also get Sisterhood of Dune for the same price here.
Here's the blurb:
It is eighty-three years after the last of the thinking machines were destroyed in the Battle of Corrin, after Faykan Butler took the name of Corrino and established himself as the first Emperor of a new Imperium. Great changes are brewing that will shape and twist all of humankind. The war hero Vorian Atreides has turned his back on politics and Salusa Secundus. The descendants of Abulurd Harkonnen Griffen and Valya have sworn vengeance against Vor, blaming him for the downfall of their fortunes. Raquella Berto-Anirul has formed the Bene Gesserit School on the jungle planet Rossak as the first Reverend Mother. The descendants of Aurelius Venport and Norma Cenva have built Venport Holdings, using mutated, spice-saturated Navigators who fly precursors of Heighliners. Gilbertus Albans, the ward of the hated Erasmus, is teaching humans to become Mentats…and hiding an unbelievable secret. The Butlerian movement, rabidly opposed to all forms of “dangerous technology,” is led by Manford Torondo and his devoted Swordmaster, Anari Idaho. And it is this group, so many decades after the defeat of the thinking machines, which begins to sweep across the known universe in mobs, millions strong, destroying everything in its path. Every one of these characters, and all of these groups, will become enmeshed in the contest between Reason and Faith. All of them will be forced to choose sides in the inevitable crusade that could destroy humankind forever...