David Crosby had a hand in ROBERT A HEINLEIN'S Variable Star actually by Spider Robinson I then proceeded to forget that fact.
Anyway, I didn't find what I was looking for, which if that sequel trilogy announced in 2009 ever came to anything. Robinson's situation post-2009 was not conducive to writing and in fact I don't know of anything novel length after 2008.
Also posted at Dreamwidth, where there are comment(s); comment here or there.
- If I ever knew