Dune: House Atreides #6

An unexpected revolt throws the balance of Ix into jeopardy and now Leto must make an important decision as the underground city is on the cusp of falling into evil hands. * And while The Bene Gesserit's oracles predicted they would need a child from the Baron Harkonnen in order to continue tracing a genetic line to their foretold messiah... their plan has not gone as well as hoped. * On the doorstep of Castle Caladan comes the man who will change everything -- Duncan Idaho has arrived.