The Seranane Construct, Book Two

Now a married man and a citizen of the distant planet Culuma, he immerses himself into the culture and everyday workings of his adopted world, setting up house with his beloved Sirian and resuming his teaching career for the benefit of those hungry to learn about Planet Earth. Along the way, he encounters yet more alien species and becomes a diplomat of sorts.

More importantly, he falls under the spell of Grand Unionism, which has great implications for the Seranane Construct. And, when he encounters another human being on Culuma, he is led to a fateful decision.