The Ultimate Wager

After the human exploration ship Bascom Hall crash-landed on the Hspa Nki's homeworld, the aliens allowed the survivors to settle on a high plateau with air too thin for the aliens-but just right for humans. For decades, the two races lived apart but at peace.When a ship from Earth blazed through the skies, the Hspa Nki journeyed up to the plateau and demanded a retroactive land tax the settlers could not pay. But the aliens took a keen interest when they saw settlers playing ultimate flyin...