Three Novels: The World Inside, Thorns, Downward to the Earth

The World Inside:

Earth 2381: The hordes of humanity have withdrawn into isolated 1000-story Urbmons, comfortably controlled multicity-buildings which perpetuate an open culture of free sex and unrestricted population growth. Nearly all of Earth's 75 billion live in the hundreds of monolithic structures scattered across the globe, with the exception of the small agricultural communes that supply the Urbmons with food. When a restless Urbmon computer engineer begins to think unblessworthy thoughts of making a trip outside, he risks being labeled a flippo, for whom there is only one punishment.

Thorns:

Duncan Chalk is a monstrous media mogul with a vast appetite for other people's pain. He feeds off it, and carefully nurtures it in order to feed it to the public. It is inevitable that Chalk should home in on Minner Burris, a space traveller whose body was taken apart by alien surgeons and then put back together again - differently. Burris' pain is constant. And so is that of Lona Kelvin, used by scientists to supply eggs for 100 children and then ruthlessly discarded. Only an emotional vampire like Chalk can see the huge audience eager to watch a relationship develop between these two damaged people. And only Chalk can make it happen.

Downward to the Earth:

Who knoweth the spirit of men that goeth upward, and the spirit of the beast that goeth downward to the earth? -Ecclesiastes 3:21

Okay, they did resemble elephants, it can't be denied. That led many people to underestimate the Nildoror and their obviously more fearsome commensals, the Sulidoror.

But aliens should never be judged by human standards, as the Company learned to its cost when Holman's World, now once again known as Belzagor, was given back to the natives and the Company sent packing. Now Edmund Gunderson, once head of the Company's operation on this world, has come back across the galaxy to settle old scores with the Nildoror. If he can even get them to acknowledge his existence.