For me the series of books by his son Brian Herbert and Kevin Anderson made it much clearer. I finally got to know what happened in The Butlerian Jihad and the in between times. I like them as well though there are those that do not and that is there right, may their blades chip and shatter!!
To anyone who has not read Dune, please do !! I am a Dune nut and have read ALL the books. I cannot get enough of Dune so I was shattered when I heard that the new movie would be delayed. I ask what are those of us with taste in science fiction going to do till then ,watch raised by wolves or discovery?? I said tasteful, not disgustingly stupid and an utter waste of time and space!!
Now this is the first book of a trilogy. I do not know yet when they they will be published. From experience with the last great trilogy they are usually space out by about one year. So now I have a big, big, big problem. If I start reading it I will get drawn into the story and before I realize I would have read the about three hundred pages. I know I will love it because the stories about these people who populate the Dune universe are wonderful.
Then what do I do ??? I will have to wait, and wait. Then today's world will come crashing in and this will sadden me greatly. Not that the world of Dune ever portrays a walk in the park kind of life. right from the very first page of the very first book the worlds and the future that Frank Herbert creates is deliciously intricate with plots and plans and powers and principalities. We learn as the story progresses what man's future has become. When you read the book it has a section that explains many things and words used in the narrative. After a while you get very comfortable with it all.