In the first book of the Asimovs' Norby Chronicles, Norby the teaching robot is drafted to help young space cadet Jeff Wells pass his Martian Swahili exam. When Jeff and good-natured Norby are thrust into a sinister plot, can they foil Ing the Ingrate in his attempt to take over the universe?

Reprint of the Walker and Company, New York, 1983 edition.