Set several millennia after the events of the previous three books, God Emperor follows the latter days of the galactic reign of a transformed Leto II Atreides, son of Paul Muad'dib, and the society, and dissidence, that long rule has brought about.
Book three of Frank Herbert's Dune series follows the young twin children of Paul Muad'dib as the navigate a changing Arrakis and a dangerous web of galactic political conspiracies.
There's six Frank Herbert novels. I'm thinking monthly, but I'm up for tweaking that.
The landmark first novel in Frank Herbert's Dune canon, which introduces a far-future universe in which the fate of a pan-galactic human empire hangs on the machinations of powerful families, political machinations, and the life and leadership of a young Paul Atreides.