How do they manage to do this?
Maybe there is more to Dianetics and Scientology than meet the eye. One site for L. Ron Hubbard says:
For all the name L. Ron Hubbard represents as the founder of Dianetics and Scientology, let us never lose sight of the man as an author - specifically, among the worlds most enduring and widely read authors of popular fiction, with international sales approaching forty million and a body of work spanning fifty years
It's the enduring part that is most impressive. Professors are subject to the imperative: Publish or Perish. And here we have three authors who have perished but continue to publish just the same. One method for achieving perpetuity of the pen appears to involve leaving behind a grieving but greedy spouse, who could personally oversee the publication of the author's works, some of which were never meant to see the light of day.
For example, Dr. Seuss appears to have died in 1991 with a list of publications whose cardinality could easily earn him a position at most universities. And yet, to assure her husband's position in the Celestial University, Audrey Geisel has insisted on publishing works such as Daisy-Head Maizy (published in 1995) and The Cat in The Hat Songbook (published in 1993), all with her husband's silent assent. Such love and devotion is rare indeed.
In L. Ron Hubbard's case, death appears only to have steeled his resolve to publish. He was pronounced deceased in 1986, and yet continues to publish both fiction (as recently as 1994) and, of course, works on Dianetics and Scientology. One such work is the subject of a court case in the U.K. I wonder if Hubbard's defense concerning the work rests on the fact that he was unaware of the work's publication, owing to the fact that he was dead at the time?
Robbins, Geisel, Hubbard---these authors deserve our admirations (and this professor's envy) at their ability to transcend the limitations of their earthly bodies and publish beyond the grave.
I would include interview material with these noted authors, but each appeared to be unavailable for comment.