Nevertheless, Yueh proves critical for the successful escape of Paul Atreides and Lady Jessica into the desert. In the "Prelude to Dune" prequel trilogy (1999–2001) by Brian Herbert and Kevin J. Anderson, it is revealed that Wanna had been instructed by the Sisterhood not to bear Yueh any children. She had told him she was infertile due to an industrial accident. A ghola of Yueh is created in "Hunters of Dune", the 2006 first installment of the Herbert/Anderson finale of the original series. In its 2007 sequel, "Sandworms of Dune" (2007), the Bene Gesserit Sheeana subjects Yueh to an intense personal trauma to restore his original memories; he recalls how Piter De Vries and Baron Harkonnen had broken the Suk conditioning by repeatedly forcing him to watch Wanna be systematically tortured and humiliated.