Dune of Dune

Then: Frank Herbert created a series of novels focused on a futuristic geo-political society. This is known as Dune.

Now: Son, Brian Herbert and Kevin J Anderson created trilogy after trilogy of prequel based on Herbert Senior's series.

Trilogy 1: Three novels taking place before the first Dune book.
Trilogy 2: Three novels taking place thousands of years before the first prequel trilogy.
Trilogy 3: The conclusion of the Dune series based on notes written by Herbert Senior.

So, what's there left to write again? Enter Paul of Dune. This novel will depict the years between the first and second Dune novels. Seriously, you guys haven't taken this thing too far. By the time Herbert Junior and Anderson are finished, the Dune saga will be the most documented series ever.