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.

From the masters of robot fiction, the acclaimed Norby books are puredelight for young and old alike. Now the Asimovs present the newest, most enchantingadventure of the one and only Norby . . . It's spring break for the students at the Space Academy, so Jeff Wells and his robotNorby are ready to have some fun! Unfortunately, they've decided to visit the planet Izz--where a sinister court jester is waiting with his evil bag of tricks.

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.

When Jeff and his robot Norby accompany Admiral Yobo to prehistoric times so the admiral can do family research, the trip turns into a dangerous adventure.