If you ever had the misfortune to read The Emperor's New Mind (published 1989) you would know that he has not had a plot to lose for quite some time now.
I read it around that time and thouroughtly enjoyed it; IIRC is basically a pop-sci intro to number theory, physics, cosmology, biology, etc, with only the last couple of chapters attempting to tie it all together into the quantum-consciousness stuff.
He seems to have been stuck in that groove ever since, though.