A human colony world is taken over by an alien breeding couple.

It was also the first colony world in this sector.

Horses were still the primary form of individual transportation on the colony world.

He'd seen it a dozen times before on colony worlds.

Would probably not live long enough to know when they arrived at their colony world.

Somehow you don't imagine such a thing on a stage one colony world.

It was a risk just coming to this colony world.

Suppose one or a group of them decided to take over a colony world?

And I want them set down on a good colony world, a decent place.

"Maybe she plans to use them and pick up one colony world after another."