David Falkayne was just a young sprout on a routine hop when his ship crash-landed on a planet with a religion that forbade the wheel. The Three-Cornered Wheel a possibility? Well, Davey saves the day with mathematical skill. He's a young man later in A Sun Invisible when assigned to find the alien invaders who seem to come from out of the blue. And he's a mite even more mature as one of The Trouble Twisters when he attempts to save one tiny portion of the species known as human from disgrace. It's just this side of Flash Gordon and there's usually a girl.