The Godmakers is one of Frank Herbert's weaker books. It was cobbled together from four previous short stories and it shows, as the various parts of the book go into wildly different directions. The first part was interesting, the idea of an organization dedicated to uncovering (and totally destroying) any tendency of a civilization to go to war; it feels like a police procedural of sorts. But then the book loses focus, goes into an incoherent and incomplete "god making" plot, then veers into Herbert's latent fear of women and some weird conspiracies that make little sense.
The book is short, so one can get through it really fast, but I won't recommend it. It does have bits of Herbert brilliant insights, but they are more like a few diamonds in a lot of rough.