With Paul supposedly dead, his children, the twins Leto II and Ghanima, are left under the regency of Alia who is suspected to have become an Abomination. The Empire has come under attack from a mysterious blind Preacher who some suspect may be Muad'Dib. With Dune becoming green and the worms dying, with a multiple of forces trying to shape Leto and Ghanima to their own desires, the children must find a way to work with their inner voices and find a future of their own. 
 I liked this book, but not as much as the first two in the Dune series. I felt that it turned the series in a new direction (which makes sense since it's all about Leto trying to change the path his father had started). I also found it far more confusing in parts than the first two, though this might have been because I read it on and off over a few months. 
 All in all, I did enjoy it and I'll definitely continue reading the series.