I second the motion, read Dune 1 - 6 first. The later books I can take or leave, they're entertaining in their own right, but IMO not exactly well written nor conforming to the "Duniverse" as I think of it. Especially in the "House" books, you can pick out the two different writing styles between chapters. One is quite well done, the other has an infuriating use of the word "like" (as in "like a ripe grapefruit hit by a club" or something...) I can only guess who is doing what writing because I have never read KJA, nor Brian without his father. The styles converge somewhat in the Jihad books, which I found more enjoyable from a stylistic standpoint but less believable.