I started "Dune" in January and am now nearing the end of "Chapterhouse: Dune". The series as a whole is so chock full of amazing wisdom and meditations on what it means to be human and how far we can stretch humanity until it becomes unrecognizable, but it gets there so slowly that the teachings kind of creep up on you in the end.

Cannot recommend the series enough. So sad that I'm reaching the end of Frank Herbert's part of the legacy, interested to see how Brian Herbert continued it.