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.

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.

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.

Of all the portions of the universe we see in the sky, the most spectacular is the Sun. Our very own star, the Sun is ruler of the Solar System. When it is shining, it drowns out everything else. When clouds cover the Sun, the day is gloomy. At night, when the Sun is not overhead, the sky is dark. All the world depends on the Sun. Topics include sunspots, flares, prominences, the Sun's atmosphere, upcoming solar eclipses, and the Sun's vital importance to life on Earth.