What role does Vincent Van Gogh's painting, Cottages at Cordeville, play in this novel?

How is Lady Jessica remembered in this novel? What is her ongoing significance in the Bene Gesserit?

How are love and hatred treated in this novel?

How are Miles Teg's powers maximized? Could he have withstood the T-probe without having first been fortified by the Reverend Mother Superior Taraza?

Why is so much of the novel set on the planet Gammu? What does it say about the state of human civilization?

Is Wyclyf Waff a positive or negative character? Provide at least three traits to support your answer.

Who are the "heretics" in Heretics of Dune? What is the significance of the title?