Maybe they should make a movie about of his I SHALL FEAR NO EVIL . .
Tycoon's mind is transplanted into his crooner secretary's body - call it 'The L Word' meets The Schizo Man
It's an interesting thing, that every Heinline novel from about 1960 on, except I think for his last one, makes some passing reference to sex-changes. I've never quite known what to make of that.
Much as I enjoyed (and still enjoy) his juvies, just about everything he wrote in his last thirty or so years boils down to people flying around the universe arguing endlessly about sex and who's in charge.