Children of Dune - Frank Herbert

Ok, this one was pretty bad. The focus is obviously on the twin kids of the god-hero of the desert planet that controls the spice (that which allows for accurate space travel) and there is trouble with Alia being possessed (again, Frank, do you have to tell us from the start that there is no possible way this isn't true? Can't you allow some mystery?) and there is a heretical preacher who we are basically told is that same god-hero (again, Frank, do you have to tell us from the start that there is (almost) no possible way this isn't true? Can't you allow some mystery?) causing trouble, and some other less interesting stuff going on. I originally liked it as I was interested in the idea of an empire that was collapsing on itself, but didn't find enough focus on those details. There is still more to this series and I should probably stop, but you know me.