The "later books" the "prequels" are not written by Frank Herbert, they're written by his son Brian and SF author Kevin J. Anderson. And not like Christopher Tolkien editing his father's notes, but a completely separate series with nothing in common with the original work.
The "later books" the "prequels" are not written by Frank Herbert, they're written by his son Brian and SF author Kevin J. Anderson. And not like Christopher Tolkien editing his father's notes, but a completely separate series with nothing in common with the original work.