Book: Children of Dune
Note: I can't write about this title without spoilers from the previous ones, so jump directly to the last paragraph if you wish to avoid them.
The third book of the Dune series, Children of Dune happens 9 years after Dune: Messiah. Blind and no longer with premonition powers, Paul went to the desert to die. His sister Alia is now in command, but something is not going well, both inside her and in the imperium. Plots and conspirators are everywhere. Dune is now advanced in the terraforming efforts, with some areas quite green, rains, and Fremen are starting to become used to water no longer being a scarce resource.
Paul and Chani twins, Leto II and Ghanima are 9-year-olds with an incredible intelligence, fully aware that something is amiss with Alia, and that they must do something to regarding their aunt, the Atreides empire, and maybe even Arrakis.
This book switches the main protagonist obviously from Paul to his family. We will learn about Alia's "issues", but the real main characters are the twins. This book also departs a lot from a "mild" sci-fi setting (worms, ghoulas and prescient powers aside), to fully embrace the fiction part. Without spoiling much, the premonition and inner voices powers that both Alia and Paul's children have go way further than the powers that Paul had, and there will be other plot twists and events that will surprise you.
The first half of the book is relatively calm, pretty much focused on politics, conspiracies and developing the characters. But, once you pass the first, half it jumps into a series of events that made me spend some long night sessions reading on and on, wanting to know what would happen next. Definitely more science-fiction than the previous titles, and, in my opinion, highly recommended.