Dune: House Harkonnen #4 — Kevin J. Anderson

Although Leto and Kailea's blossoming romance brings about the expectation of their first child, political complications put a strain on their thoughts, while a traitor looms in their midst.
On Lankiveil, Glossu Rabban turns trophy hunting into what the Harkonnens are known for bestâ€"their brutality.
And as the years pass, a shadow still follows Leto and Kailea, seeding further discontent, even as an exile from Ix comes seeking help, and maybe even liberation for the planet!