Instruct: Classify a review as either positive or negative.
Query: disappointing

The first dune novel was fantastic. Exciting, well paced, great characters, amazingly creative. However, the follow books I find become very vague, and needlessly complicated. As the story progresses I found that too many concepts had to be filled in by the reader, as herbert refuses to explain them. I struggled through god emporer, and now can't manage to sit through the remaining two books. My advice, read Dune, and just use your imagination to fill in what happens afterwards, it'll be more rewarding that way