Jeff Wells leaves the space academy with his mixed-up robot Norby,and the two of them head back to Earth to help Jeff's brother unravel a mystery involving zapped robots and stolen computer parts.

Still more Asimov robots in this fast-paced, futuristic action/adventure ( Booklist), from the authors of Norby and Yobo's Great Adventure. The planet Jamyn is throwing a royal birthday bash for the Grand Dragon. Jeff and Norby are invited too--on one condition: they must persuade the Grand Dragon's mother to attend the festivities as well.